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Sunday, July 19, 2026

Expand Yellowstone National Park


 July 17, 2026


For several years, I have advocated for expanding Yellowstone National Park to create a Greater Yellowstone Ecosystem National Park.

There are many reasons to expand Yellowstone’s boundaries to include much of the surrounding national forest and other public lands that make up the Greater Yellowstone Ecosystem.

The Greater Yellowstone Ecosystem has global significance. Yellowstone is a UNESCO Biosphere Reserve, recognized for its ecological diversity, conservation efforts and significant geological features.

If Yellowstone and the surrounding lands are to survive as a functioning ecosystem, we must recognize that the entire region is under multiple stressors.

Climate change is the greatest long-term threat. Climate change may make it impossible for many of the ecosystem’s plant and animal species to continue inhabiting the area.

Growing recreational use can harm and disturb sensitive wildlife.

Mining, logging and livestock grazing all affect ecosystem function. Enlarging the National Park Service’s administration of the ecosystem would eliminate ongoing threats from mining, logging and livestock grazing, since all are prohibited in national parks.

Finally, growing population growth in the region brings its own challenges.

So why expand Yellowstone to create a Greater Yellowstone Ecosystem National Park?

First, consolidating the majority of public lands in the ecosystem under a single agency will improve efficiency and effectiveness.

In particular, the mission and general goal of the National Park Service management is to preserve ecosystem function by minimizing human impacts. Compared to other state and federal agencies, the Park Service has a natural tendency to protect biodiversity and ecological integrity.

Creation of a Greater Yellowstone Ecosystem National Park would provide greater protection for predators, as trapping and hunting are prohibited within park units.

Expansion would allow bison to expand their population into suitable habitat. Even if bison were hunted beyond the expanded boundaries, the larger bison population would suffer less from genetic and other harm resulting from hunting, trapping and slaughter.

In other areas, like the Upper Green River Allotment in Wyoming, where livestock grazing has led to the killing of dozens of grizzly bears, expansion would eliminate livestock and thus conflicts.

The NPS administration favors native wildlife and plants. For instance, restoring native fish to the degree possible is a goal of NPS management.

NPS management generally favors maintaining natural ecological processes. Processes like insect outbreaks, wildfires, drought, flooding, predation and harsh winter weather are allowed to operate without human interference.

We have an obligation and responsibility to preserve the Greater Yellowstone Ecosystem. Creation of a Greater Yellowstone Ecosystem National Park would be a major step towards achieving that goal.

George Wuerthner has published 36 books including Wildfire: A Century of Failed Forest Policy


The Long War on Bears Ears and Grand Staircase 

Erik Molvar


How decades of attacks on Utah’s national monuments culminated in Trump’s latest attempt to erase them.

In southern Utah, two crown-jewel landscapes have been the subject of a political tug-of-war spanning the past 25 years. On one end of the rope, Tribes, conservation groups, and the recreating public have sought – and gotten – expanded protections for Bears Ears and Grand Staircase-Escalante National Monuments. Pulling the other end, the livestock industry, mining corporations, and Big Oil have joined forces with anti-regulation local governments to push to maximize the lands available for extractive use and minimize the protections.

This week, the Trump administration sided with the industrial interests and anti-environmental local governments to slash the two National Monuments by 90 percent, pulling the figurative rope back over to the side of exploitation.

The lands of southern Utah were wrested from the stewardship of multiple Indigenous tribes by EuroAmerican colonization, starting with Father Escalante in 1776. The modern battle over these lands started in 1996, when President Bill Clinton signed a proclamation establishing Grand Staircase-Escalante National Monument, recognizing “a geologic treasure of clearly exposed stratigraphy and structures.” “The monument,” Clinton proclaimed, “contains significant portions of a vast geologic stairway, named the Grand Staircase by pioneering geologist Clarence Dutton, which rises 5,500 feet to the rim of Bryce Canyon in an unbroken sequence of great cliffs and plateaus.” It contains paleontological features like fossils and dinosaur trackways, and cultural sites including Indigenous sites, Mormon pioneer sites, and the Old Paria townsite (a movie set, it turns out). The new Monument spanned 1.7 million acres of public land that are the traditional homelands of the Paiute, Hopi, Ute Mountain Ute, Navajo, and Zuni peoples.

A local history recounts some of the environmental battles that have ensued since Clinton’s proclamation. Andalex Resources, Inc. held claims to potentially-lucrative coal reserves in Smokey Hollow on the Kaiparowitz Plateau, and they scrapped their plans for a strip mine after the Monument was designated. There was controversy around oil and gas drilling by Conoco on state lands within the Monument boundary. And local counties tried to create new roads within the Monument using the obscure Reserve Statute 2477 to establish that livestock trails should be reclassified as county roads. Meanwhile, Grand Canyon Trust began to buy out grazing leases in the Escalante Canyons from ranchers who wanted to retire them because the allotments were too remote, too treacherous, too full of poisonous plants, and too troublesome to be worth continuing their cattle operations.

In 1997, the Utah Association of Counties filed a lawsuit, and Mountain States Legal Foundation filed a companion suit (represented by William Perry Pendley, who later would be appointed interim BLM Director during the first Trump administration), to overturn Grand Staircase-Escalante National Monument. They argued that the century-old Antiquities Act was unconstitutional, that the National Monument was larger than the minimum area necessary to protect the objects of scientific and cultural interest for which it had been designated, and even that the proclamation violated the Wilderness Act by establishing de facto wilderness. They lost on all counts, with a decisive ruling from the District Court in 2004. It stated,


The Proclamation of which plaintiffs complain speaks in detail of the Monument’s natural and archeological resources and indicates that the designated area is the smallest consistent with the protection of those resources. The language of the Proclamation clearly indicates that the President considered the principles that Congress required him to consider: he used his discretion in designating objects of scientific or historic value, and used his discretion in setting aside the smallest area necessary to protect those objects.

Mountain States Legal Foundation appealed (the counties did not), but was found to lack standing to bring forward a legal challenge, and its case was dismissed.

The dust did not remain settled for long. In 2013, Rep. Rob Bishop (R-UT) kicked off the Utah Public Lands Initiative (UPLI), a process in which environmental and conservation interests were forced to collaborate with industrial interests, in an effort to put the fate of public lands conservation under “local control.” This process culminated in a bill that proposed to designate a modest Bears Ears National Conservation Area, spanning 857,603 acres. The UPLI bill was deemed by tribes and conservation groups to give away too much public land to industrial interests, so it never gained traction in Congress and ultimately died.

In 2015, five local Tribes – the Hopi, Navajo, Ute, Zuni, and Ute Mountain Ute – abandoned the UPLI proposal and authored the original proposal to protect a National Monument at Bears Ears to protect the abundant cliff dwellings and other archaeological sites, inspiring slot canyons and buttes, and native ecosystems of the Bears Ears area. Conservation groups advocated in support of the Tribes’ proposal, which encompassed potential wilderness like the Grand Gulch Primitive Area, and landmarks like Valley of the Gods, Comb Ridge, Cedar Mesa, and the Bears Ears themselves (a pair of buttes that can be seen from afar, rising from the flanks of the Abajo Mountains). The Tribal proposal was a natural complement to other protected lands in the region, including Canyonlands, Bryce Canyon, and Zion National Parks, as well as tribally-managed Monument Valley immediately to the south on the Navajo reservation.

Environmental threats began to these lands began to mount, with proposals for uranium mining and oil and gas drilling adding to the chronic degradation of livestock grazing on the fragile biological soil crusts of Cedar Mesa and the surrounding canyon country.

The Obama administration sought to solve the problem while appeasing local anti-conservationists, and instead of designating all of the Bears Ears Tribal proposal, he created a smaller, 1.35 million acre Bears Ears National Monument that lopped off half a million acres to assuage concerns from local governments. Among the lands excluded were Wilson Mesa, the eastern slopes of the Abajo Mountains, and the lands between Red Canyon and White Canyon. But he did add Tribal co-management, a key aspect that the Indigenous governments were seeking. While many were privately disappointed that the resulting National Monument was smaller than it should have been, it was widely celebrated by both Tribes and conservation groups (including WWP) as a major achievement.

The anti-conservation local governments, unsatisfied with the half a million acres that got pulled out of the National Monument at their request, cried foul. But they were powerless to overcome President Obama’s Monument proclamation.

In the spring of 2017, newly-elected President Trump sent Ryan Zinke, his Secretary of Interior, to Bears Ears on a listening tour of the Bears Ears region. He wasn’t a very good listener. In fact, when was asked by an Indigenous representative why he refused a meeting with the Bears Ears Intertribal Council, he scolded, “Be nice. Don’t be rude.”

This slap in the face of Indigenous interests was the prelude to an even bigger slap in the face: President Trump’s December 2017 proclamation slashing the size of Bears Ears from 1.35 million acres to 121,096 acres in two isolated units. He tried to put a veneer of Indigenous legitimacy on his rescission by renaming Bears Ears the Shash Jáa National Monument. No one was fooled. Gone was Indigenous co-management, replaced by an advisory committee where white representatives would outnumber Tribal ones. Trump’s proclamation also reopened the Grand Canyon Trust’s grazing allotments in the Escalante Canyons to livestock grazing.

The rope was tugged back In 2021, when President Joe Biden issued two new proclamations for Bears Ears and Grand Staircase-Escalante, restoring the original Obama Monuments and adding 13,000 additional acres that were added during the Trump recission. Biden’s Interior developed Monument Management Plans.

Then in 2026, a Congressional Review Act bid to overturn the Management Plan by Sen. Mike Lee (R-UT) and Rep. John Curtis (R-UT) failed as the clock ran out before the resolution could come to the floor. This was a radical move, because the Congressional Review Act overturns not just the federal rule (in this case, a management plan) in question, but also permanently blocks any “substantially similar” rule from ever taking effect in the future. If the CRA had eviscerated the monument plans, the monuments could have been left unmanaged.

And then, last week, the latest pull back over to the side of extraction. According to Trump’s own Fact Sheet on the recent rescission, “One Proclamation reduces the size of the Grand Staircase-Escalante National Monument from approximately 1.87 million acres to approximately 181,500 acres. Another Proclamation reduces the size of the Bears Ears National Monument from approximately 1.36 million acres to approximately 121,100 acres.” Everything else in his Fact Sheet is pure fiction. It’s not “rightsizing” and doesn’t “reduce these monuments to appropriate sizes.” It slashes protections across 90 percent of the public lands that were designated, leaving the majority of the “objects of historic or scientific interest” for which Bears Ears and Grand Staircase-Escalante were designated, completely unprotected. Cliff dwellings. Pictograph panels. Dinosaur tracks. Ancient fossils. An entire staircase of exposed sedimentary layers marching down toward the Grand Canyon, telling the story of eons of geologic creation that took hundreds of millions of years to complete.

The new Monument Proclamations for Bears Ears and Grand Staircase wave away these historically and scientifically important objects by arbitrarily reclassifying them as “generic features and landscapes” or having “relative commonness” throughout the region. If one President protects cliff dwellings and pictograph panels and geologic features as significant, can a later President declare them insignificant? And how do we reconcile this wholesale dismissal of sacred sites?

Under the Antiquities Act, the President “is hereby authorized, in his discretion, to declare by public proclamation historic landmarks, historic and prehistoric structures, and other objects of historic or scientific interest” as National Monuments. Congress did not give the President authority to subtract from National Monuments in any way. Nor did Congress grant a sitting President the authority to second-guess the decisions of a previous President that objects deemed significant from a scientific or cultural perspective and decide that they have suddenly become insignificant. In legal parlance, yesterday’s monument proclamations are an action deemed ultra vires, or “beyond the powers” of the President under the Antiquities Act. Congress makes the law, Presidents sign the law, and future Presidents are required to follow the law.

But this new Trump proclamation goes even farther, promoting extractive uses within the tattered fragments of the remaining National Monuments, stating that the “Secretaries shall endeavor to authorize traditional land uses within the Monument, such as grazing, recreation, timber management, public access, and infrastructure development, to the greatest extent possible….” (Emphasis added.) It directs federal officials to “consider livestock grazing to constitute a traditional cultural place (TCP) and shall consider how proposed activities will impact that TCP….” That’s another backhanded swipe at the Tribes: The acronym TCP actually stands for Traditional Cultural Property, which refers to tribally-identified cultural sites that are given federal protection under the National Historic Preservation Act.

For more than a century, Presidents have proclaimed national monuments, many of them across very large acreages. Theodore Roosevelt was the first, setting the precedents that still apply today. Roosevelt proclaimed 808,120 acres of public land as Grand Canyon National Monument, to protect “an object of unusual scientific interest, being the greatest eroded canyon in the United States.” He wasn’t trying to appease anybody. This, after the local publication, Williams Sun editorialized that an 1895 congressional bill to protect the Grand Canyon was a “fiendish and diabolical scheme” drawn up by lawmakers “suckled by a sow and raised by an idiot,” and protesting that “the fate of Arizona depends exclusively upon the development of her mineral resources.” Sound familiar? The rhetoric coming out of Utah anti-environmentalists echoes these warped sentiments.

One year after designating the Grand Canyon NM (which later became a National Park), Roosevelt designated Mount Olympus National Monument, encompassing 610,560 acres to protect “numerous glaciers” and “the summer range and breeding grounds of the Olympic elk.” Both the Grand Canyon and Mount Olympus grew to be crown jewels of our National Park System, and economic engines of regional prosperity.

Trump isn’t half the president of Theodore Roosevelt. Not even a tiny fraction. You can tell by the size of his Monuments.

For the Grand Canyon, monument opponents filed a lawsuit, in a case called Cameron v. United States, which went all the way to the Supreme Court. The Supreme Court affirmed that the Grand Canyon is an object of scientific interest and affirmed Roosevelt’s expansive National Monument designation.

So when President Trump trots out the tired old argument that Bears Ears and Grand Staircase-Escalante were not “confined to ‘the smallest area compatible with the proper care and management of the objects to be protected,’” and asserts an “overreach and abuse of the Antiquities Act,” he’s contradicting a century of applicable precedent for the statute.

The Tribes have been swift to weigh in. The Bears Ears Intertribal Coalition stated that this latest Bears Ears proclamation “weakens protections for a living cultural landscape and sacred ancestral homeland that has been cared for by Indigenous peoples since time immemorial.” Grand Staircase-Escalante Inter-Tribal Coalition Coordinator Autumn Gillard, a Southern Paiute, stated of that monument proclamation, “Today’s action is a direct strike against the federal government’s duty to consult with Tribes. It also profoundly disrespects our intergenerational Traditional Knowledge by destroying a framework for Tribal co-stewardship over our ancestral lands in which we invested years of effort. Today’s action cannot stand.”

Trump’s Bears Ears proclamation is seven times smaller than the UPLI legislation that was sponsored by Rob Bishop, the most famously anti-environmental Member of Congress – out of 571 in Congress – at the time. Congratulations, Mr. President, you have won the race to the bottom. We’ll see you in court.

Erik Molvar is a wildlife biologist and is Executive Director of Western Watersheds Project, a nonprofit group dedicated to protecting and restoring watersheds and wildlife on western public lands.

Friday, March 13, 2026

 

The fish were biting in ancient Alabama



Research collaboration uses high-tech scanning technology to reveal a bad-luck day for an ancient undersea predator




University of Tennessee at Knoxville

The Fish Were Biting in Ancient Alabama 

image: 

Scientists discovered a huge tooth embedded in the neck of a fossil of a four-meter-long Polycotylus from the Mooreville Chalk of Alabama.

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Credit: University of Tennessee




The oceans of the Cretaceous of North America teemed with life. Gigantic fish and enormous marine reptiles hunted the Western Interior Sea. A unique new fossil reported today demonstrates rare evidence of direct conflict between these apex predators.

Scientists discovered evidence for this clash of Cretaceous titans tucked away in a specimen drawer in the collections of Chicago’s Field Museum of Natural History. The fossil, a four-meter-long Polycotylus from the Mooreville Chalk of Alabama, held a hidden surprise in one of the bones: a huge tooth embedded in one of the animal’s neck vertebrae.

The specimen was noticed by Professor Christopher Brochu, of the University of Iowa Department of Earth and Environmental Sciences, while taking a break from looking at fossil crocodiles.

“I sometimes look at other material to see if there’s anything I can show in my classes, and that’s when I saw the bitten vertebra,” said Brochu.

The violence of the bite, partnered with millions of years of burial, fossilization, and eventual excavation, had left the tooth crushed, broken at base and tip, and embedded inside the bone. The research team turned to technology to help identify the mystery attacker.

The fossil was scanned using computed tomography (CT), a visualization technique that allowed the research team to study the inside of the specimen without damaging it. The fossil was virtually dissected by two University of Tennessee, Knoxville undergraduates, Miles Mayhall and Emma Stalker, who built a three-dimensional model of a tooth from an unexpected culprit: an enormous bony predatory fish called Xiphactinus.

“We sometimes get these fixed ideas in our heads about who the top predator in any given environment is and who might rest a rung or two down on the food chain,” said lead author and paleontologist Stephanie Drumheller, a teaching associate professor from the Department of Earth, Environmental, and Planetary Sciences at UT. “This fossil is a good reminder that nature is rarely that cut and dry.”

It was unlikely that the Xiphactinus, as big as it was, was actually trying to eat the Polycotylus. Several famous “fish-within-a-fish” fossils seem to indicate that the predator likes to gulp down smaller fish whole. The embedded tooth could have been the result of the fight instead of a hunt. No matter the original motivation for the bite, its depth and location would have certainly proved fatal.

“Plesiosaurs are famous for their long necks, but those necks come at a price,” said coauthor Professor Robin O’Keefe, of the Department of Biological Sciences at Marshall University. “The trachea, esophagus, major arteries and veins, important nerves; all these organs lie vulnerable to attack. A bite to the neck by Xiphactinus would have certainly proved fatal to this animal, if the Polycotylus was not already dead.”

The dramatic evidence of this attack joins a whole host of other evidence known from Mooreville Chalk. Bite marks attributable from other bony fish, sharks, and marine reptiles are known from these rocks, painting a picture of a dynamic ecosystem with diverse predators targeting all sorts of prey, from other marine animals, to the occasional hapless dinosaur who was washed out to sea, to one another. Taken all together, these fossils suggest that swimming in these Cretaceous seas would have been a risky proposition for even the largest of these ancient marine predators.


he Fish Were Biting in Ancient Alabama 2 

The vertebrae fossils and scans of the unfortunate Polycotylus examined in this research, showing the embedded tooth of the Xiphactinus.

Credit

University of Tennessee

Monday, February 23, 2026

 

New ‘scimitar-crested’ Spinosaurus species discovered in the central Sahara


The first indisputable evidence of a new species of Spinosaurus in over a century belongs to S. mirabilis, named for its scimitar-shaped crest and found at a locality far from the ocean’s edge



University of Chicago Medical Center

Paleoartist rendering of S. mirabilis 

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Paleoartist rendering of Spinosaurus mirabilis eating a coelacanth. Art by Dani Navarro.

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Credit: Art by Dani Navarro





new paper published in Science describes the discovery of Spinosaurus mirabilis, a new spinosaurid species found in Niger. A 20-person team led by Paul Sereno, PhD, Professor of Organismal Biology and Anatomy at the University of Chicago, unearthed the find at a remote locale in the central Sahara, adding important new fossil finds to the closing chapter of spinosaurid evolution.

Eye-catching anatomy

The scimitar-shaped crest of S. mirabilis was so large and unexpected that the paleontologists initially didn’t recognize it for what it was when they plucked it and some jaw fragments from the desert surface in November 2019. Returning with a larger team in 2022 and finding two additional crests, they realized the novelty of the new species they had unearthed. Based on the crest’s surface texture and interior vascular canals, the experts believe the crest was sheathed in keratin. They reckon that this display feature was brightly colored in life, curving toward the sky as a blade-shaped beacon.

Another striking feature of the skull is its interdigitating upper and lower tooth rows, which make a deadly trap for slippery fish. Interdigitating teeth, where those of the lower jaw protrude outward and between those of the uppers, is a time-honored adaptation among fish-eaters in the fossil record — including aquatic ichthyosaurs, semi-aquatic crocodile and airborne pterosaurs. Among dinosaurs, it sets Spinosaurus and closest kin apart.

“This find was so sudden and amazing, it was really emotional for our team,” Sereno said. “I’ll forever cherish the moment in camp when we crowded around a laptop to look at the new species for the first time, after one member of our team generated 3D digital models of the bones we found to assemble the skull — on solar power in the middle of the Sahara. That’s when the significance of the discovery really registered.”

Far from shore

Previously, spinosaurid bones and teeth had only been found principally in coastal deposits not far from the shoreline, leading some experts to hypothesize recently that these fish-eating theropods may have been fully aquatic, pursuing prey underwater.

However, the new fossil area in Niger documents animals that were living inland, some 500-1000 km from the nearest marine shoreline. Their proximity to intact partial skeletons of long-necked dinosaurs, all buried in river sediments, suggest they lived in a forested inland habitat dissected by rivers.

“I envision this dinosaur as a kind of ‘hell heron’ that had no problem wading on its sturdy legs into two meters of water but probably spent most of its time stalking shallower traps for the many large fish of the day,” Sereno said.

A remarkable expedition to Niger

The journey that culminated in this remarkable discovery started with a single sentence in a monograph from the 1950s, where a French geologist mentioned finding a single sabre-shaped fossilized tooth resembling those of the giant predator Carcharodontosaurus found in Egypt’s Western Desert at the turn of the last century.

“No one had been back to that tooth site in over 70 years,” Sereno mused. “It was an adventure and a half wandering into the sand seas to search for this locale and then find an even more remote fossil area with the new species. Now all of the young scholars who joined me are co-authors on the report gracing the cover of Science.”

The team ended up meeting a local Tuareg man who led them on his motorbike deep into the center of the Sahara, where he had seen huge fossil bones. After nearly a full day of travel with no shortage of doubts regarding the success of the effort, he led them to a fossil field. There, with little time to spare before returning to camp, the team found teeth and jaw bones of the new species of Spinosaurus.

“I was attracted to the Sahara like a magnet once I set foot there 30 years ago,” Sereno said. “There’s nowhere else like it. It’s as beautiful as it is daunting.” After excavating more than 100 tons of fossil finds, he says of the Sahara, “If you can brave the elements and are willing to go after the unknown, you might just uncover a lost world.”

This latest discovery adds to Niger’s rich legacy in paleontology and archaeology, both of which Sereno has engaged. He has led an international award-winning effort to build the world’s first zero-energy museum, the Museum of the River, on an island in the center of Niger’s capital city of Niamey. It will showcase their world class patrimony that documents Africa’s lost world of dinosaurs, now including an astonishing spinosaur species, as well as stone-age cultures that once lived in a Green Sahara.

“The local people we work with are my lifelong friends, now including the man who led us to Jenguebi and the astonishing spinosaur. They understand the importance of what we’re doing together — for science and for their country,” Sereno said.

Envisioning Spinosaurus mirabilis with multimedia science and paleoart

Back home in Chicago, Sereno’s team at his South Side Fossil Lab in Washington Park cleaned and then CT scanned the teeth and bones, assembling a digital skull rendering for the research report. Using that rendering, Sereno worked with paleoartist Dani Navarro in Madrid to create an action scene involving flesh reconstructions of the new species tussling over a coelacanth carcass. Navarro went farther, creating a detailed 3D physical model of S. mirabilis by adding flesh over a skeletal reconstruction.

Other paleoartists in Chicago (Jonathan Metzger) and Italy (Davide la Torre) animated Nararro’s model, bringing back to life the action behind the scene chosen for the cover of Science. More adept programs, cameras and drones have revolutionized visualization in paleontology as practiced today in the field and lab.

Inspiring young minds

As part of these reconstruction efforts, the team also prepared a replica of the newly discovered skull and a touchable, colorful model of the scimitar crest.

On March 1, in the wake of the Science paper, both replicas will join Sereno’s previous Dinosaur Expedition exhibit at the Chicago Children’s Museum, where kids will be among the first to get up close and personal  with this latest dinosaur find.

“Letting kids feel the excitement of new discoveries — that’s key to ensuring the next generation of scientists who will discover many more things about our precious planet worth preserving,” Sereno said.

 

New scimitar-crested Spinosaurus species from the Sahara caps stepwise spinosaurid radiation” was published in Science in February 2026. Co-authors are Paul C. Sereno, Daniel Vidal, Nathan P. Myhrvold, Evan Johnson-Ransom, María Ciudad Real, Stephanie L. Baumgart, Noelia Sánchez Fontela, Todd L. Green, Evan T. Saitta, Boubé Adamou, Lauren L. Bop, Tyler M. Keillor, Erin C. Fitzgerald, Didier B. Dutheil, Robert A. S. Laroche, Alexandre V. Demers-Potvin, Álvaro Simarro, Francesc Gascó-Lluna, Ana Lázaro, Arturo Gamonal, Charles V. Beightol, Vincent Reneleau, Rachel Vautrin, Filippo Bertozzo, Alejandro Granados, Grace Kinney-Broderick, Jordan C. Mallon, Rafael M. Lindoso and Jahandar Ramezani.

Fossilized head crests of S. mirabilis were among the researchers’ first finds in the remote fossil area they call Jenguebi. Photo by Daniel Vidal.

Credit

Photo by Daniel Vidal



Dan with first Spinosaurus mirabilis bones-Nov 2019 

With only a few hours to spend after discovering the remote fossil area Jenguebi in November of 2019, Spanish paleontologist

Dan Vidal hovers over a quickly gathered collection of fossils, which included the crest and jaw pieces of a new scimitar-
crested spinosaurid Spinosaurus mirabilis (photograph by Paul Sereno)

Credit

`Photograph by Paul Sereno



Paul Sereno poses with reconstructed skull of Spinosaurus mirabilis. Photograph by Keith Ladzinski.

Credit

Photograph by Keith Ladzinski

A single Spinosaurus mirabilis rears over a carcass of the coelacanth Mawsonia on the forested bank of a river some 95 million years ago in what is now the Sahara Desert in Niger. A scimitar-shaped head crest and interdigitating teeth characterize this wading giant, one of the last-surviving species of a spinosaurid radiation some 50 million years in the making (artwork by Dani Navarro)

Credit

Artwork by Dani Navarro