Sunday, November 05, 2023

SOUNDS LIKE THE CARNIVALE SIDE SHOW
After being frozen for 500 years, face of the ‘Ice Maiden’ revealed


Ashley Strickland, CNN
Sat, 4 November 2023 

The snow-capped Andes in South America have long fascinated humans with their soaring peaks and alien landscapes.

Near the summit, there is no vegetation in sight, and freezing temperatures and howling winds add to the inhospitable conditions — which is why scientists were surprised to find life in such a desolate place.


In 2020, researchers spotted a leaf-eared mouse commonly found at lower elevations living more than 20,000 feet above sea level. Now, another team has uncovered active animal burrows and the mummified remains of the same species, which essentially became freeze-dried by the Mars-like conditions near the summit.

But how, and why, did the mice become the world’s highest-dwelling mammal?

It’s one of many mysteries presented by the Andes. In fact, the small creatures aren’t the only mummies to be found among the peaks in recent years.

We are family


A 3D reconstruction of the Ice Maiden is now on display in a new exhibit at the Andean Sanctuaries Museum in Arequipa, Peru. - Dagmara Socha

When archaeologist Dr. Johan Reinhard discovered a cloth bundle high in the Peruvian Andes 28 years ago, he lifted the fabric and saw the “Ice Maiden.”

The mummified remains of an Inca teenager, sacrificed and left near the summit of the dormant volcano Ampato about 500 years ago, were incredibly well-preserved by the mountain’s frigid conditions.

Now, a team of archaeologists has used 3D scanning techniques and scientific analysis to recreate what she looked like before her untimely death.

The reconstruction is part of a new exhibit at the Andean Sanctuaries Museum in Arequipa, Peru, that features what researchers currently know about the Ice Maiden and the symbolic artifacts buried with her remains.


A young woman was sacrificed and frozen for 500 years in the Andes. Scientists just revealed her face

Ashley Strickland, CNN
Fri, 3 November 2023 

Five hundred years ago, a teenage girl who was part of the Inca culture was sacrificed and buried near the summit of Ampato, a dormant volcano in the Andes Mountains. Since the discovery of her incredibly well-preserved frozen remains in 1995, she has become known by many names — the “Ice Maiden,” Juanita and the Lady of Ampato — but little was known about who she really was.

Now, Swedish artist Oscar Nilsson and a team of researchers from the Center for Andean Studies at the University of Warsaw and the Catholic University of Santa Maríahave have collaborated to create a 3D reconstruction of Juanita’s face.

The reconstruction, unveiled on October 24, is part of an exhibition at the Andean Sanctuaries Museum in Peru called “Capacocha, following the Inca Divinities.” The exhibition includes the latest research about Juanita and her life, as well as the findings from other Incan mummies discovered along the peaks of the Peruvian Andes.

“For many years, mummies were treated as objects in the museum,” said Dr. Dagmara Socha, bioarchaeologist at the Center for Andean Studies at the University of Warsaw and curator of the exhibit. “By conducting scientific research and facial reconstruction, we want to restore their identity. A well-made reconstruction allows us to show the people who were behind the story we want to tell.”

Finding Juanita

The Inca Empire, which lasted from around 1200 to 1533, once stretched for 2,500 miles (4,023 kilometers) across what is now Peru and Chile. One of the most crucial rituals to the Incas was capacocha, Socha said, which involved human sacrifices with offerings of prestigious goods such as ceramics, precious metals, textiles and seashells.


The rituals were carried out to appease deities and sacred places and protect the community from disasters such as droughts, volcanic eruptions and earthquakes, according to researchers. The peaks of the Andes were considered sacred places, and children and young women, considered beautiful and pure, were chosen for the sacrificial rituals. Their sacrifices were thought to bring honor to their parents and an afterlife of bliss.

Once sacrificed, the children and young women were considered “mediators” between humans and deities. It was believed that the children became reunited with their ancestors, who were thought to watch from the towering peaks of the Andes, the researchers said.

Dr. Johan Reinhard and assistant Miguel Zarate discovered Juanita when they ascended Ampato in September 1995. They reached the summit, 20,708 feet (6,312 meters) above sea level, only to discover that part of its ridge had collapsed, exposing an Inca burial site and tumbling the contents about 229 feet (70 meters) below.

Reinhard and Zarate spotted a bundle of cloth, and lifting it, they found themselves looking into the Ice Maiden’s face. Carefully, they brought Juanita down the mountain, where she is kept to this day in a chamber set at minus 4 degrees Fahrenheit (minus 20 degrees Celsius) in the Andean Sanctuaries Museum of the Catholic University of Santa María, where museumgoers can see her on display.

Studies have revealed that Juanita was a healthy girl between 13 and 15 when she died from a blow to the head.


Replicas of the artifacts buried with the Ice Maiden are on display and visitors can touch them to feel their weight and texture. - Dagmara Socha

She was buried in ceremonial clothing, along with ceramic objects, gold and silver female figures, a Spondylus shell, food, woven bags and pottery. The ceramic objects were decorated with geometric figures, which are still being studied and may have been part of an Inca communication system.
Coming face to face

In 2018, Socha and a team of archaeologists and scientists began a five-year project to research Juanita as well as other remains and objects found on the snow-covered Ampato, Misti and Pichu Pichu volcanoes.

During their work, the team discovered that some of the children and women chewed coca leaves and drank ayahuasca in the weeks before their deaths. The findings suggest that hallucinogenic plants and psychotropic stimulants may have been used to reduce anxiety before their deaths.

The team conducted CT scans of Juanita in March 2022 and used the results to create a 3D model of her skull that Nilsson could use to guide his reconstruction.

Tomography scans of her body and skull, combined with research about her age, complexion and other characteristics were used to create digital images. Nilsson used tissue depth markers based on the measurements of her skull to envision the proportions of her face, which included high cheekbones.

Tissue depth markers and CT scans helped Oscar Nilsson reconstruct the Ice Maiden's face. - Oscar Nilsson

His process of bringing Juanita’s face to life took half a year, and he spent 400 hours working on the model.

Known for his work in recreating faces from the past, Nilsson employed a forensic reconstruction technique that relied on a variety of scientific analyses to make Juanita look as realistic as possible.

“It is a fantastic job I have, but I also feel a great deal of responsibility to get the reconstruction as accurate as I can,” Nilsson said. “But it is the best work I can imagine. I hope you will be able meet an individual from the past and to create an emotional bond to history, and her story that is so unique and remarkable.”

Reproductions of the headdress and shawl she wore were naturally dyed and made from alpaca wool by Centro Textiles Tradicionales in Chinchero and Cusco, Peru.

Visitors to the exhibit can also learn about the results of the research, see artifacts from the burials and hold replicas of them. They can even walk in the footsteps of Juanita from Cusco, the capital of the Inca Empire, across ranches, or tambos, where the caravan rested before the sacrifice, and all the way up to the peaks.

“Using (virtual reality) goggles, the visitors can make a virtual pilgrimage in the footsteps of capacocha, following the remains of Inca roads to the tambos — the last stops — on the slopes of Chachani, Misti and Pichu Pichu,” Socha said.

For the researchers who have spent years studying Juanita, the arduous process to bring her back to life was worth it.

“The face gives us the hyperrealistic impression of looking at the living person,” Socha said.

“It was for me a very emotional moment after working so many years with these mummies, to be able to finally look at her face.”


Genes from ancient ancestor may have helped us deal with cold weather but passed on depression

Joe Pinkstone
Fri, 3 November 2023 

The gene is thought to have been beneficial to Denisovans and the early Homo sapiens - MAAYAN HAREL

Genes from an ancient human ancestor that made them better able to deal with cold weather could be to blame for depression in some modern people, a study suggests.

Scientists detected the mutated gene in some people’s DNA whose origins stem from when humans interbred with Denisovans millennia ago.

The gene, called SLC30A9, is thought to have been beneficial to Denisovans and the early Homo sapiens who mated with them because it made them more resilient to the cold.

However, the gene may have a side effect in modern people who have inherited it as it can lead to faulty signalling in the brain.

Denisovans were a species of ancient humans which were a sister species to Neanderthals that formed around 600,000 years ago.

The cold-weather adaptation was likely to have helped them to survive in their home area around Tibet and Siberia.

They later interbred both with Neanderthals and Homo sapiens before going extinct around 15,000 years ago.
Study of ancient and modern genomes

During these inter-species trysts, a variation of the gene was passed from Denisovans to humans, a study of ancient and modern genomes found.

The Denisovan version of the gene led to more zinc being transported into cells and boosted energy production of the mitochondria, allowing people with this mutated gene to stay warm.

But the same Denisovan gene has been shown to also have psychiatric impacts and make people more prone to schizophrenia and depression.

“Through genomic analysis, we noted that the genetic variant observed came from our interbreeding with archaic humans in the past, possibly the Denisovans”, says Ana Roca-Umbert, co-first author of the study from Pompeu Fabra University in Barcelona.
Cold-weather gene does not exist in the Neanderthals

The gene could not have come from the mating with Neanderthals, they say, as this cold-weather gene does not exist in the Neanderthals.

“Apparently, the change was beneficial and proved a selective advantage for humans,” added Jorge Garcia-Calleja, co-first author of the study.

“As a consequence, this variation in the SLC30A9 gene was selected and has reached current populations.”

But previous studies have linked this gene variant to increased risk of anorexia, hyperactivity disorder, autism, bipolar, depression, OCD and schizophrenia.

The study on zinc’s impact was done on cells in a lab and the team hopes to expand to animal models.
Excitability of the nervous system

Evidence was seen that the mutated form leads to increased excitability of the nervous system and a type of equilibrium of the metal in the brain which is different to that of people with the original gene.

The cold-hardy and depression prone gene is more common in people of Asian heritage, data show, and less common in people of African descent.

This is a result of how the population of people who dispersed out of Africa mingled with those that had inherited the Denisovan gene in Asia.

Denisovans likely had a skull that was wider than that of modern humans or Neanderthals, a 2019 study found.

The existence of Denisovans was only discovered in 2010 when scientists found a small finger bone in a cave in the Altai Mountains in Siberia, named the Denisova Cave.

Svante Pääbo, the pioneering paleogeneticist, first proved the existence of Denisovans and won a Nobel Prize in 2022 for his work, which also provided the first evidence humans and other ancient human species mated.

Scientists have progressively learnt more about the lives, genes and appearance of Denisovans, including what they looked like, their range, and when they likely existed.

The new study is published in the journal PLOS Genetics.

Archaeologists in Germany find centuries-old skeleton with prosthetic hand


Issy Ronald and Barbara von Bulow, CNN
Fri, 3 November 2023 

Archaeologists in Germany have uncovered a centuries-old skeleton complete with a metal prosthetic hand to replace four missing fingers.

The Bavarian State Office for Monument Preservation said in a statement published last week that archaeologists used carbon dating to estimate that the man died some time between 1450 and 1620, aged between 30 and 50 years old. This would make the prosthetic hand potentially almost 600 years old.

The fingers on the man’s left hand appear to have been amputated and the remains of the hand were surrounded in a hollowed-out case wrought from iron and other metal, revealing the advanced state of medicine at the time, archaeologists said.


An X-ray shows the bones surrounded by metal. - Bayerisches Landesamt für Denkmalpflege


“The hollow hand prosthesis on the left hand added four fingers,” Walter Irlinger, head of the Bavarian archaeological monument conservation department, said in the statement.

“The index, middle, ring and little fingers are individually formed from sheet metal and are immobile. The finger replicas lie parallel to each other, slightly curved. Presumably the prosthesis was attached to the stump with straps,” he added.

A bandage-like fabric was found inside the prosthetic hand, suggesting that it was used to cushion the stump.

The remains were found in a grave near a church in the Bavarian town of Freising, about 40 kilometers (25 miles) north of Munich, during utility work.


Archaeologists estimated that the man was between 30 and 50 years old when he died. - Bayerisches Landesamt für Denkmalpflege

Freising was the site of several battles during the Middle Ages and during the Thirty Years’ War of 1618-1648. This probably increased the number of amputations and consequently led to more prostheses, the statement said.

About 50 similar prostheses dating from the same time period have been uncovered in Central Europe, ranging in complexity from an immobile one like the one found in Friesing to an intricate, moving prosthetic hand famously worn by the knight Götz von Berlichingen after 1530, archaeologists added.

And an even older, 3,000-year-old prosthetic wooden toe was uncovered by archaeologists in Egypt in 1997.

Worn by a priest’s daughter, the toe was made to both enable walking and look aesthetically natural, archaeologists later discovered.


Archaeology: Larger-scale warfare may have occurred in Europe 1,000 years earlier


Peer-Reviewed Publication

SCIENTIFIC REPORTS





A re-analysis of more than 300 sets of 5,000-year-old skeletal remains excavated from a site in Spain suggests that many of the individuals may have been casualties of the earliest period of warfare in Europe, occurring over 1,000 years before the previous earliest known larger-scale conflict in the region. The study, published in Scientific Reports, indicates that both the number of injured individuals and the disproportionately high percentage of males affected suggest that the injuries resulted from a period of conflict, potentially lasting at least months.

Conflict during the European Neolithic period (approximately 9,000 to 4,000 years ago) remains poorly understood. Previous research has suggested that conflicts consisted of short raids lasting no more than a few days and involving small groups of up to 20–30 individuals, and it was therefore assumed that early societies lacked the logistical capabilities to support longer, larger-scale conflicts. The earliest such conflict in Europe was previously thought to have occurred during the Bronze Age (approximately 4,000 to 2,800 years ago).

Teresa Fernández‑Crespo and colleagues re-examined the skeletal remains of 338 individuals for evidence of healed and unhealed injuries. All the remains were from a single mass burial site in a shallow cave in the Rioja Alavesa region of northern Spain, radiocarbon dated to between 5,400 and 5,000 years ago. 52 flint arrowheads had also been discovered at the same site, with previous research finding that 36 of these had minor damage associated with hitting a target. The authors found that 23.1% of the individuals had skeletal injuries, with 10.1% having unhealed injuries, substantially higher than estimated injury rates for the time (7–17% and 2–5%, respectively). They also found that 74.1% of the unhealed injuries and 70.0% of the healed injuries had occurred in adolescent or adult males, a significantly higher rate than in females, and a difference not seen in other European Neolithic mass-fatality sites.

The overall injury rate, the higher injury rate for males, and the previously observed damage to the arrowheads suggest that many of the individuals at the burial site were exposed to violence and may have been casualties of conflict. The relatively high rate of healed injuries suggests that the conflict continued over several months, according to the authors. The reasons for the conflict are unclear, but the authors speculate on several possible causes, including tension between different cultural groups in the region during the Late Neolithic.

SPACE STORIES
Night sky: The Welsh connection to the Andromeda Galaxy

Jonathan Powell, South Wales Argus astronomy writer
Fri, 3 November 2023

In this article:
Charles Messier
18th- and 19th-century French astronomer

Messier 31

Here's the latest Night Sky column from Argus astronomy correspondent Jonathan Powell:

A SPACE mission due to launch in the 2030s with the intention of studying how the universe was created, will have significant input from experts at Cardiff University.

Along with the actual technology involved, the university will feature prominently in the study and analysis of data to be collected from the LiteBIRD spacecraft, as it investigates the still present traces left over from the Big Bang which occurred some 13.7 billion years ago.

Saturday, October 28, saw a partial lunar eclipse as a shadow cast by the Earth clipped a portion of the Moon.

The next lunar eclipse will occur on Monday March 25, 2024.
The Andromeda Galaxy

If you are just starting out in astronomy, there are a number of objects for any potential bucket-list that one would like to observe.


South Wales Argus: Andromeda Galaxy Star Map - Credit EarthSky

Pinpointing certain stars and identifying the constellations will take time as they change with the seasons, along with the planets of our solar system.

However, one particular object adds a different dimension to the learning curve, that of locating and seeing for yourself, a galaxy.

Martin Griffiths, astronomer and science presenter at Dark Sky Wales, who is also director at the Brecon Beacons Observatory, spoke to use about Isaac Roberts, (1829 – 1904), engineer and businessman, who flew the flag for Wales as a pioneer in astronomy.

He said: "The autumn sky returns one of the most sought-after astronomical objects, the wonderful galaxy in Andromeda otherwise known as Messier 31.

"Noted by ancient astronomers such as Al Sufi in his Book of the Fixed Stars in 954 AD and described as seen through the telescope by Simon Marius in 1612, this object continues to draw observers and novice stargazers every season it appears.

"Included in Charles Messier’s catalogue of nebulous objects in 1764 as number 31, the true nature of this object eluded astronomers until the mid-20th century when it was discovered to be a galaxy, an “Island Universe” in its own right by Edwin Hubble.

"His work was the culmination of many observations regarding the true nature of the object and the tool of astrophotography was instrumental in revealing it.

"Before Hubble, Welsh astronomer Isaac Roberts took one of the greatest photographs of this wondrous galaxy.

"Roberts was born in Denbighshire in 1829, the son of a farmer. He grew up to become an engineer and amateur astronomer who built his own telescopes before commissioning Grubb Parsons to make him a 20-inch reflector, a very large telescope for an amateur.

"By 1883 he was experimenting with astrophotography and in 1885 he mounted the photographic plates directly at the prime focus of the 20-inch telescope to get larger images. In 1886 he exhibited his photographs at the Royal Astronomical Society of Liverpool, one of which detailed the nebulosity surrounding the stars of the Pleiades.

"On December 29, 1888, Roberts took what is now recognised as one of the greatest images in amateur studies.

"His subject was the Andromeda galaxy and his resulting plate revealed its spiral structure and the hint of resolution into stars. It was possibly the earliest photograph of the galaxy and although Roberts thought it revealed a solar system in the making, his image helped professional astronomers develop theories about these island universes which eventually led to our current understanding of galaxies and their place in the cosmos.

"Roberts eventually moved to Sussex and built a large observatory for the 20-inch where he continued to photograph the night sky. Roberts remained a member of the Liverpool Astronomical Society and became a Fellow of the Royal Geological Society.

"For his pioneering efforts in astrophotography, he was awarded the gold medal of the Royal Astronomical Society in 1895. After his death his wife donated money to French Astronomical Society which resulted in the biennial Dorothea Klumpe-Isaac Roberts prize, still awarded today.

"Roberts was proud of his Welsh heritage and spoke Welsh at home throughout his life. He left money in his will to Bangor, Cardiff and Liverpool Universities and now has a crater on the Moon named in his honour.

"The superb picture of Messier 31 remains the legacy of this far-sighted Welsh genius."
How to find the Andromeda Galaxy

This can be located with binoculars, appearing as a small, fuzzy, oval object.

The Andromeda galaxy is the nearest galaxy to our own Milky Way, at a distance of 2.5 million light-years.

Containing around one trillion stars, it measures a staggering 220,000 light-years across.

On clear nights, with good observing conditions, it can be seen with the naked-eye.


South Wales Argus: Partial Lunar Eclipse - Jason Mead

Meteor shower


The Leonids meteor shower starts on Monday, November 6, running until the last day of the month.

Peak activity is on the night of Friday November 17 into morning of Saturday November 18, with the expected hourly rate of meteors, ZHR, (Zenith Hourly Rate), around 15.

Situated in the constellation of Leo, the debris burning up in the atmosphere as "shooting stars" heralds from rocks and rubble left in the path of comet 55P/Tempel-Tuttle, during its 33-year orbit of the Sun.

All observing can be done with the naked eye, so there is no need for a telescope or binoculars.

November’s Beaver Moon

November’s full Moon has, like other full Moons, several names, but one which is probably used more than others is Beaver Moon, so-called as the beaver population take shelter in their lodges, ahead of the winter months.

Beginner’s corner

As a help to beginners to find their way around the night sky, use the Moon during November to try and locate some bright stars on view.

On Friday, November 3, the Moon is positioned to the south of Pollux, the brightest star in the constellation of Gemini, the Twins.

On Monday, November 6, the Moon is positioned to the north of Regulus, the brightest star in Leo, the Lion.

On Saturday, November 11, the Moon is positioned to the north of Spica, the brightest star in Virgo, the Virgin.

On Monday, November 27, the moon is positioned to the north of Aldebaran, the brightest star in Taurus, the Bull.
Planets

Jupiter continues to dazzle in the southern half of the sky during November.

On Wednesday, November 1, Jupiter was at its closest to Earth, (perigee), with "opposition" – in line with the Earth and Sun, achieved on Friday, November 3.

As a result, Jupiter looks spectacular, with binoculars, (10 x 50 or larger), revealing Jupiter’s four inner moons, (showing as points of light near the planet).

A small telescope, (75 mm or larger), should reveal clouds in the form of bands on Jupiter’s disc.

On Saturday, November 25, the Moon will appear nearby.

While Jupiter is situated in the constellation of Aries, Saturn is also positioned to the south, in Aquarius. Try and locate the planet by using a nearby First Quarter Moon on Monday, November 20.

Venus dominates the morning sky in the east, rising about 4.5 hours before the Sun.

On Thursday, November 9, there’s a lovely pairing in the morning twilight as a crescent Moon pair up with Venus. Venus will appear to nestle just below the Moon.


South Wales Argus: Jonathan Powell, astronomy writer for the South Wales Argus

Moon phases

Third Quarter: November 5;


New Moon: November 13;


First Quarter: November 20;


Full Moon: November 27.


Across the universe


The James Webb Space Telescope spied new details within the Crab Nebula, a supernova remnant. - NASA/ESA/CSA/STScI/Tea Temim

The James Webb Space Telescope peered inside the heart of the Crab Nebula to study the aftermath of a stellar explosion.

The space observatory spied previously unseen details within the glowing cloud of gas and dust that had been created by a supernova. The explosion was so bright when it appeared in the night sky in 1054 that astronomers believed it to be a new star.

Separately, other NASA missions captured a ghostly handlike feature in the cosmos and an eerie “face” within the swirling clouds in Jupiter’s atmosphere.

— When an asteroid struck the planet 66 million years ago, leading to the mass extinction of dinosaurs, it filled the atmosphere with enough dust to halt a key process for life on Earth.

— The ancient planet that collided with Earth and formed the moon could also have created continent-size swaths of alien material inside our planet, according to new research.

— Space Perspective, a tourism startup, is offering passengers a “loo with a view” as they travel 100,000 feet to the edge of space in a pressurized capsule suspended from a high-tech balloon.

And on Sunday night, look up at the Southern Taurid meteor shower for a chance to see a bright fireball or two streaking across the sky.


Other worlds

The Lucy mission finally had its first close look at an asteroid — and it discovered a space rock surprise.

Launched in October 2021, the NASA spacecraft is the first designed to study the swarms of Trojan asteroids within Jupiter’s orbit.

To test Lucy’s systems and instruments before observing the Trojans, the probe first zoomed by Dinkinesh, located between Jupiter and Mars.

The images returned by the spacecraft revealed humanity’s first close look at Dinkinesh, which turned out to be a pair of space rocks rather than a single asteroid.

NASA sent a spaceship rocketing by an asteroid — and discovered the space rock has a little baby one dancing around it

Sonam Sheth
Fri, 3 November 2023

NASA sent a spaceship rocketing by an asteroid — and discovered the space rock has a little baby one dancing around it


A rendering of NASA's Lucy Spacecraft and images of the binary asteroid system Dinkinesh — nicknamed "Dinky."NASA

NASA sent a spacecraft flying by the Dinkinesh asteroid.

The agency discovered that Dinkinesh is actually a binary asteroid system.

The Lucy spacecraft discovered that the larger asteroid has a baby asteroid dancing around it.

NASA sent a spacecraft flying by what it initially thought was one asteroid.

But the Lucy spacecraft returned images showing that the asteroid Dinkinesh is actually a binary asteroid system, meaning there are two asteroids orbiting a common center. In this case, the system features asteroids of different sizes — one much smaller than the other.

"Dinkinesh really did live up to its name; this is marvelous," Hal Levison, the principal investigator for Lucy who works at the Southwest Research Institute, said in a press release from NASA. "When Lucy was originally selected for flight, we planned to fly by seven asteroids. With the addition of Dinkinesh, two Trojan moons, and now this satellite, we've turned it up to 11."

Lucy flew by the asteroid system at a speed of 10,000 miles per hour, NASA said. The researchers working on the spacecraft had suspected that Dinkinesh might be a binary pair because of the way its brightness changed with time. The images the spacecraft returned confirmed their theory, according to the news release.

Lucy's flight was intended to be a test of the spacecraft — and it passed with flying colors.

"This is an awesome series of images," Tom Kennedy, a guidance and navigation engineer at Lockheed Martin in Colorado, said in the news release. "They indicate that the terminal tracking system worked as intended, even when the universe presented us with a more difficult target than we expected."

NASA’s Lucy spacecraft discovers 2nd asteroid during Dinkinesh flyby


Reports and Proceedings

NASA/GODDARD SPACE FLIGHT CENTER

NASA’s Lucy Spacecraft Discovers 2nd Asteroid During Dinkinesh Flyby 

IMAGE: 

THIS IMAGE SHOWS THE “MOONRISE” OF THE SATELLITE AS IT EMERGES FROM BEHIND ASTEROID DINKINESH AS SEEN BY THE LUCY LONG-RANGE RECONNAISSANCE IMAGER (L’LORRI), ONE OF THE MOST DETAILED IMAGES RETURNED BY NASA’S LUCY SPACECRAFT DURING ITS FLYBY OF THE ASTEROID BINARY. THIS IMAGE WAS TAKEN AT 12:55 P.M. EDT (1655 UTC) NOV. 1, 2023, WITHIN A MINUTE OF CLOSEST APPROACH, FROM A RANGE OF APPROXIMATELY 270 MILES (430 KM). FROM THIS PERSPECTIVE, THE SATELLITE IS BEHIND THE PRIMARY ASTEROID. THE IMAGE HAS BEEN SHARPENED AND PROCESSED TO ENHANCE CONTRAST.

 

view more 

CREDIT: NASA/GODDARD/SWRI/JOHNS HOPKINS APL/NOAO




On Nov. 1, NASA’s Lucy spacecraft flew by not just its first asteroid, but its first two. The first images returned by Lucy reveal that the small main belt asteroid Dinkinesh is actually a binary pair.

“Dinkinesh really did live up to its name; this is marvelous,” said Hal Levison, referring to the meaning of Dinkinesh in the Amharic language, “marvelous.” Levison is principal investigator for Lucy from the Boulder, Colorado, branch of the San-Antonio-based Southwest Research Institute. “When Lucy was originally selected for flight, we planned to fly by seven asteroids. With the addition of Dinkinesh, two Trojan moons, and now this satellite, we’ve turned it up to 11.”

In the weeks prior to the spacecraft’s encounter with Dinkinesh, the Lucy team had wondered if Dinkinesh might be a binary system, given how Lucy’s instruments were seeing the asteroid’s brightness changing with time. The first images from the encounter removed all doubt. Dinkinesh is a close binary. From a preliminary analysis of the first available images, the team estimates that the larger body is approximately 0.5 miles (790 m) at its widest, while the smaller is about 0.15 miles (220 m) in size.

This encounter primarily served as an in-flight test of the spacecraft, specifically focusing on testing the system that allows Lucy to autonomously track an asteroid as it flies past at 10,000 mph, referred to as the terminal tracking system.

“This is an awesome series of images. They indicate that the terminal tracking system worked as intended, even when the universe presented us with a more difficult target than we expected,” said Tom Kennedy, guidance and navigation engineer at Lockheed Martin in Littleton, Colorado. “It’s one thing to simulate, test, and practice. It’s another thing entirely to see it actually happen.”

While this encounter was carried out as an engineering test, the team’s scientists are excitedly poring over the data to glean insights into the nature of small asteroids.

“We knew this was going to be the smallest main belt asteroid ever seen up close,” said Keith Noll, Lucy project scientist from NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “The fact that it is two makes it even more exciting. In some ways these asteroids look similar to the near-Earth asteroid binary Didymos and Dimorphos that DART saw, but there are some really interesting differences that we will be investigating.”

It will take up to a week for the team to downlink the remainder of the encounter data from the spacecraft. The team will use this data to evaluate the spacecraft’s behavior during the encounter and to prepare for the next close-up look at an asteroid, the main belt asteroid Donaldjohanson, in 2025. Lucy will then be well-prepared to encounter the mission’s main targets, the Jupiter Trojan asteroids, starting in 2027.

 

SwRI-led Lucy mission shows Dinkinesh asteroid is actually a binary


NASA’s Lucy spacecraft makes first asteroid flyby

Reports and Proceedings

SOUTHWEST RESEARCH INSTITUTE

"Moonrise" of Dinkinesh's Satellite 

IMAGE: 

NEW IMAGES CAPTURED BY NASA’S LUCY SPACECRAFT CONFIRMED THAT THE SMALL MAIN BELT ASTEROID DINKINESH IS A BINARY. THIS IMAGE SHOWS THE “MOONRISE” OF DINKINESH’S SATELLITE. THE SWRI-LED MISSION WILL FLY BY 11 TOTAL ASTEROIDS OVER ITS 12-YEAR MISSION TO JUPITER’S TROJAN ASTEROIDS.

 

view more 

CREDIT: NASA/GODDARD/SWRI/JOHNS HOPKINS APL




SAN ANTONIO — November 3, 2023 —New images captured by NASA’s Lucy spacecraft confirmed that the small main belt asteroid Dinkinesh is a binary, two asteroids that orbit a common center of mass. The SwRI-led mission will now fly by 11 asteroids in its 12-year mission to Jupiter’s Trojan asteroids. Dinkinesh was meant to be the first asteroid that Lucy flew by but ended up being the first two.

“Dinkinesh really did live up to its name; this is marvelous,” said Lucy Principal Investigator Dr. Hal Levison, of SwRI’s Solar System Science and Exploration Division in Boulder, Colorado, referring to the meaning of Dinkinesh (“you are marvelous”) in Amharic. “When Lucy was originally selected for flight, we planned to flyby seven asteroids. With the addition of Dinkinesh, two Trojan moons, and now this satellite, we’ve turned it up to 11.”

As Lucy approached Dinkinesh, the team noticed that the asteroid’s brightness was changing in interesting ways, and the team wondered if Dinkinesh was a binary system. As the spacecraft sent back its first images, this was confirmed: Dinkinesh is a close binary. From a preliminary analysis of the first available images, the team estimates that the larger body is approximately 0.5 miles (790 m) at its widest, while the smaller is about 0.15 miles (220 m) in size.

This flyby of Dinkinesh primarily served as an in-flight test of the spacecraft, specifically focusing on testing the systems that allow Lucy to autonomously track an asteroid as it flies past at 10,000 miles per hour, referred to as the terminal tracking system.

“We have seen many asteroids up close, and one may think little is left to discover and surprise us. Well, that is clearly wrong. Dinkinesh, and its enigmatic moonlet, differ in some interesting ways from the similarly sized near-Earth asteroids that have been seen by spacecraft like OSIRIS-REx and DART,” said Deputy Principal Investigator Dr. Simone Marchi of SwRI.

While this encounter was carried out as an engineering test, the team’s scientists are excitedly poring over the data to glean insights into the nature of small asteroids.

“Sharing the anticipation of viewing the first images with the team has been incredibly thrilling, as has been the lively discussion regarding the geology of these two remarkably small yet fascinatingly intriguing targets. I am eagerly looking forward to unraveling the color variations across this binary system,” said Dr. Silvia Protopa of SwRI.

The Lucy team will continue to downlink the remainder of the encounter data from the spacecraft over the next week. They will use the data to evaluate Lucy’s behavior during the encounter and prepare for the next close-up look at an asteroid, the main belt asteroid Donaldjohanson, in 2025. Lucy will then be well prepared to observe the mission's main targets, the Jupiter Trojan asteroids, starting in 2027.

For more information, visit https://www.swri.org/planetary-science.

Dinkinesh Animation [VIDEO] |

Jurassic worlds might be easier to spot than modern Earth


Peer-Reviewed Publication

CORNELL UNIVERSITY




ITHACA, N.Y. –Things may not have ended well for dinosaurs on Earth, but Cornell University astronomers say the “light fingerprint” of the conditions that enabled them to emerge here provide a crucial missing piece in our search for signs of life on planets orbiting alien stars.

Their analysis of the most recent 540 million years of Earth’s evolution, known as the Phanerozoic Eon, finds that telescopes could better detect potential chemical signatures of life in the atmosphere of an Earth-like exoplanet more closely resembling the age the dinosaurs inhabited than the one we know today.

Two key biosignature pairs – oxygen and methane, and ozone and methane – appeared stronger in models of Earth roughly 100 million to 300 million years ago, when oxygen levels were significantly higher. The models simulated the transmission spectra, or light fingerprint, generated by an atmosphere that absorbs some colors of starlight and lets others filter through, information scientists use to determine the atmosphere’s composition.

“Modern Earth’s light fingerprint has been our template for identifying potentially habitable planets, but there was a time when this fingerprint was even more pronounced – better at showing signs of life,” said Lisa Kaltenegger, director of the Carl Sagan Institute (CSI) and associate professor of astronomy. “This gives us hope that it might be just a little bit easier to find signs of life – even large, complex life – elsewhere in the cosmos.”

Kaltenegger is co-author of “Oxygen Bounty for Earth-like Exoplanets: Spectra of Earth Through the Phanerozoic,” published in Monthly Notices of the Royal Astronomical Society: Letters. First author, Rebecca Payne, research associate at CSI, led the new models that details a critical epoch including the origins of land plants, animals and dinosaurs.

Using estimates from two established climate models (called GEOCARB and COPSE), the researchers simulated Earth’s atmospheric composition and resulting transmission spectra over five 100-million-year increments of the Phanerozoic. Each features significant changes as a complex ocean biosphere diversified, forests proliferated and terrestrial biospheres flourished, influencing the mix of oxygen and other gasses in the atmosphere.

“It’s only the most recent 12% or so of Earth’s history, but it encompasses pretty much all of the time in which life was more complex than sponges,” said Payne. “These light fingerprints are what you’d search for elsewhere, if you were looking for something more advanced than a single-celled organism.”

While similar evolutionary processes may or may not unfold on exoplanets, Payne and Kaltenegger said their models fill in a missing puzzle piece of what a Phanerozoic would look like to a telescope, creating new templates for habitable planets with varying atmospheric oxygen levels.

Kaltenegger pioneered modeling of what Earth would look like to faraway observers based on changes over time in its geology, climate and atmosphere – our “ground truth,” she said, for identifying potential evidence of life on other worlds.

To date, about 35 rocky exoplanets have been discovered in habitable zones where liquid water could exist, Kaltenegger said. Analyzing an exoplanet’s atmosphere – if it has one – is at the edge of technical capability for NASA’s James Webb Space Telescope but is now a possibility. But, the researchers said, scientists need to know what to look for. Their models identify planets like Phanerozoic Earth as the most promising targets for finding life in the cosmos.

They also allow scientists to entertain the possibility – purely theoretical – that if a habitable exoplanet is discovered to have an atmosphere with 30% oxygen, life there might not be limited to microbes, but could include creatures as large and varied as the megalosauruses or microraptors that once roamed Earth.

“If they’re out there,” Payne said, “this sort of analysis lets us figure out where they could be living.”

Dinosaurs or not, the models confirm that from a great distance, such a planet’s light fingerprint would stand out more than a modern Earth’s.

For additional information, see this Cornell Chronicle story.

Cornell University has dedicated television and audio studios available for media interviews.

-30-



BVO
FDA proposes ban on potentially harmful ingredient found in some sodas



Kristen Rogers, CNN
Fri, November 3, 2023 

The US Food and Drug Administration has proposed revoking its regulation authorizing the nationwide use of brominated vegetable oil, or BVO, as an additive in food.

The FDA’s decision comes after California banned the ingredient in October by passing the California Food Safety Act, the first state law in the United States to ban brominated vegetable oil. The additive is already banned in Europe and Japan.

“The agency concluded that the intended use of BVO in food is no longer considered safe after the results of studies conducted in collaboration with the National Institutes of Health … found the potential for adverse health effects in humans,” said James Jones, the FDA’s deputy commissioner for human foods, in a statement.

Brominated vegetable oil — vegetable oil modified by bromine, a pungent, deep red oily chemical — is used as an emulsifier in citrus-flavored beverages to keep the flavoring from separating and floating to the top. Bromine is also commonly used in flame retardants.

It’s possible that dozens of products — mostly sodas — use brominated vegetable oil as an ingredient, according to the Eat Well Guide by the Environmental Working Group, a nonprofit research and advocacy group that focuses on consumer health, toxic chemicals and pollutants.

The low number of products containing this ingredient is due to past restrictions by the FDA.

“In 1970, the FDA determined BVO was no longer ‘Generally Recognized as Safe’ … and began overseeing its use under our food additive regulations,” Jones said in a statement. “Over the years many beverage makers reformulated their products to replace BVO with an alternative ingredient, and today, few beverages in the U.S. contain BVO.”

Additionally, a 2012 petition with more than 200,000 signatures also brought attention to health concerns, according to an EWG news release. It also said many companies eliminated it from consumer products due to market pressure.
How brominated vegetable oil could harm health

Brominated vegetable oil has been linked to health hazards including nervous system damage, headaches, skin and mucous membrane irritation, fatigue, and loss of muscle coordination and memory, according to the EWG. The ingredient can also accumulate in the body over time.

The studies motivating the FDA’s decision were conducted in animals, but the observed negative health effects were at levels closely approximating real-world human exposure, according to a news release. One harm some research found is toxic effects on the thyroid gland, which produces hormones critical for the regulation of blood pressure, heart rate, body temperature and metabolism.

“Today’s announcement will ensure everyone has access to products that don’t contain BVO,” Scott Faber, the EWG’s senior vice president for government affairs, said in a statement.

Jones of the FDA said the proposed ban “is an example of how the agency monitors emerging evidence and, as needed, conducts scientific research to investigate safety related questions, and takes regulatory action when the science does not support the continued safe use of additives in foods.”

A final decision is yet to come — following reception of comments through January 17, 2024, and a review process — but if you want to avoid consuming brominated vegetable oil until then, check the ingredients lists of products before you buy them.

The FDA proposed to ban brominated vegetable oil. Here's how to tell if it's in your food, and why the FDA thinks it's unsafe to drink.

Jenny McGrath,Maiya Focht
Fri, 3 November 2023 

Check the ingredients list for traces of brominated vegetable oil.Stefania Pelfini, La Waziya Photography / Getty Images / Amazon

The US Food and Drug Administration announced it wants to ban the additive brominated vegetable oil.


The product helps stabilize citrus flavor in some sodas and juices, but can build up in the body.


A final decision will be made in the coming year, but other countries have long since banned it.

This week, the US Food and Drug Administration proposed revoking a regulation that authorizes the use of brominated vegetable oil in food.

Food companies have used the additive BVO since the 1920s. For decades, manufacturers used it to keep fruit flavoring in a stable form that doesn't separate and rise to the top. It was used in some sodas, fruit juices, and other drinks with citrus oil.

"The agency concluded that the intended use of BVO in food is no longer considered safe after the results of studies conducted in collaboration with the National Institutes of Health (NIH) found the potential for adverse health effects in humans," James Jones, the FDA's deputy commissioner for human foods, said in a statement released Thursday.

He noted that the move follows a recent ban on the ingredient in California. In October, California Gov. Gavin Newsom signed a law prohibiting the sale of food or drink items with BVO and other ingredients like red dye 3 and potassium bromate.

The FDA is accepting comments on its proposal through January 17, 2024.
How can you tell what drinks contain BVO?

In 1958, the FDA gained the authority to determine the safety of food ingredients. In the years following, it listed BVO as generally recognized as safe.

Over the years, new data showed potential health effects, and the FDA removed it from the GRAS list in the '60s. The agency limited its use to a stabilizer that couldn't exceed the level of 15 parts per million in the drinks.

The FDA notes that many beverage companies have since found alternative stabilizers. For example, in 2014, Coca-Cola announced it was removing BVO from Powerade drinks.

But you may still find BVO in some soft drinks or other fruit-flavored drinks.

If you want to avoid BVO, you should check the ingredients in sodas, fruit drinks, lemonade, and juices.

When used, BVO is required to be listed as an ingredient on the label as "brominated vegetable oil" or as the specific oil that has been brominated, such as "brominated soybean oil".

BVO side effects


The FDA has been monitoring the effects of BVO since the 1970s, after a report showed that it could cause heart problems when taken in large doses, according to the agency's press release. In the decades since, sparse reports have emerged about its potential harms.

There are anecdotal reports of people visiting the hospital with telltale signs of bromine poisoning — headache, fatigue, memory loss, and problems walking. In one 1997 case, doctors determined that a patient had gotten the condition from drinking 2-4 liters of soda with BVO in it a day.

BVO can also hurt the parts of your body used in eating and drinking, Katherine Zeratsky, a registered dietitian at the Mayo Clinic, told Food Network. "Health concerns about BVO stem from one of its ingredients, bromine. Bromine can irritate the skin, nose, mouth" she said.

In a 2022 report published in the journal Food and Chemical Toxicology, the FDA found that BVO may build up in mice thyroids over time, becoming toxic. Though they conducted these tests in mice, not humans, the agency deemed its results were significant enough to recommend against the use of BVO in food.


In humans, thyroids help control blood pressure, temperature, heart rate, and metabolism. Thyroid damage can cause weight fluctuations, heart rate irregularity, decreased energy, poor bone health, and more.

The final results of the proposal won't be fully processed until 2024, CNN reported.



FDA to Finally Outlaw Soda Ingredient Banned Around The World

Story by Mike McRae • ScienceAlert


An ingredient once commonly used in citrus-flavored sodas to keep the tangy taste mixed thoroughly through the beverage could finally be banned for good across the US.

The FDA has proposed to revoke the registration of a modified vegetable oil known as BVO in the wake of recent toxicology studies that make it difficult to support its ongoing use.

"The proposed action is an example of how the agency monitors emerging evidence and, as needed, conducts scientific research to investigate safety related questions, and takes regulatory action when the science does not support the continued safe use of additives in foods," says James Jones, FDA deputy commissioner for human foods.

BVO, or brominated vegetable oil, has been used as an emulsifying agent since the 1930s to ensure citrus flavoring agents don't float to the top of sodas. Sticking a dozen bromine atoms to a triglyceride creates a dense oil that floats evenly throughout water when mixed with less dense fats.

Yet that's not BVO's only trick. Animal studies have strongly implied the compound can slowly build up in our fat tissues. With bromine's potential ability to prevent iodine from doing its all-important work inside the thyroid, health authorities around the world have been suspicious of the emulsifier's risks for decades.

In fact, BVO is already banned in many countries, including India, Japan, and nations of the European Union, and was outlawed in the state of California just last October with legislation due to take effect in 2027.

Yet the FDA has been slow to convince. In the 1950s, the agency regarded the ingredient as generally recognized as safe (GRAS); an official classification afforded items that have either been appropriately tested or – for ingredients in common use prior to 1958 – don't appear to be harmful.

That changed the following decade when questions were raised over its possible toxicity, prompting the FDA to overturn its GRAS classification for BVO and temporarily limit its use to relatively small concentrations of no more than 15 parts per million exclusively in citrus-flavored drinks.

Data on the risks posed by even these small amounts of BVO over time hasn't been easy to collect, relying heavily on long-term studies that re-evaluate health effects in a significantly-sized sample of people. Yet the evidence has been slowly mounting.

UK study in the 1970s found bromine was building up in human tissues, with animal studies linking high concentrations of BVO with heart and behavioral problems.

It's taken time, and a number of further studies, but on the back of more recent animal studies based on relative concentrations of BVO humans are likely to ingest, the FDA is finally convinced there is sufficient evidence to ban its use altogether.

Most major soda drink companies are fortunately ahead of the game. PepsiCo and Coca-Cola Co. have been phasing the ingredient out of their products over the past decade.

"Over the years many beverage makers reformulated their products to replace BVO with an alternative ingredient, and today, few beverages in the US contain BVO," says Jones.

The ban could be a sign of more things to come, with Jones announcing the agency is reviewing regulations that authorize the use of certain food additives, with a view to automatically prohibit the approval of any food coloring agents found to cause cancer in humans or animals, making for a more nimble bureaucratic process.

A final call on the FDA's reclassification of BVO still needs to go through a lengthy review process that is unlikely to be completed before early 2024.

With suitable alternatives to BVO already being used to make citrus drinks around the world taste tangy down to the very last drop, the ingredient isn't likely to be missed.


California becomes first US state to ban 4 potentially harmful chemicals in food