Tuesday, December 16, 2025

Book prepares K-12 leaders for the next public health crisis


University of Illinois at Urbana-Champaign, News Bureau
School books and a child's mask 

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The task of keeping children safe and in school was a formidable challenge for educators, parents and community leaders. 

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Credit: Photo by Michelle Hassel




CHAMPAIGN, Ill. — In a new book, a team of experts in educational policy, epidemiology and public health chronicles the challenges faced by educators, public health authorities and school officials during the COVID-19 pandemic and offers a guide to some of the lessons learned as K-12 schools weathered that crisis. One key message: Collaboration between schools, public health authorities and community leaders is essential to success.

The book, “K-12 Schools and Public Health Partnerships: Strategies for Navigating a Crisis with Trust, Equity, and Communication,” describes the enormous challenges schools faced when the World Health Organization declared in March 2020 that COVID-19 was a global pandemic. School district leaders across the U.S. “had to make rapid decisions about school closures, remote learning plans, staff safety, student meal distribution and communication with anxious families — all while working with limited information and unclear guidance,” the authors wrote.

The four co-authors were themselves drawn into the crisis. Each provided their own leadership and expertise to decision-makers in public health and schools and observed the successes and failures of efforts in their communities. During the peak of the crisis, Leah Perkinson, a pandemics manager at The Rockefeller Foundation and a former researcher at the U.S. Centers for Disease Control and Prevention, led national pandemic response efforts, coordinated communities of practice and compiled public health guidance documents. Lisa C. Barrios, currently the director of the Division of Readiness and Response Science at the CDC, led activities to help schools prevent, mitigate and respond to the COVID-19 pandemic. University of Illinois Urbana-Champaign pathobiology professor Rebecca Lee Smith, an epidemiologist, advised those working to track and reduce the spread of infection in schools and businesses across Illinois. Rachel Roegman, a professor of education policy, organization and leadership at the U. of I. whose work focuses on how to make schools more affirming spaces for potentially marginalized students, saw how inequities in school communities could exacerbate the tragic toll of the disease.

The book includes dozens of interviews with school, public health and community leaders who played key roles in responding to the crisis in K-12 schools, harvesting a trove of useful insights and practical guidance. The book focuses on the importance of building trust, prioritizing the needs of those most at risk and building accurate and reliable communication channels. These factors were intertwined and foundational to success, the authors wrote.  

The best way to build trust was to make an effort to reach out to families and students to ask them what they needed — and finding resources to meet those needs, the authors wrote. During the COVID-19 pandemic, this meant offering students the laptops essential for online learning and showing them how to connect, creating Wi-Fi hubs for neighborhoods that lacked them, developing new systems for distributing school lunches and offering in-person learning hubs for students whose parents were essential workers.

Building trust and enhancing communication also meant creating accessible online dashboards that offered up-to-date testing and infection-rate data for the community along with information about how to access testing sites or services. Communication also was enhanced when community organizations, schools and political leaders coordinated their efforts and collaborated on messaging to speak with one voice.

Serving those most at risk of harm from the pandemic meant planning centered on those with disabilities, those speaking languages other than English and low-income or undocumented families. “Planning from the margins” meant that no one was treated as an afterthought or left out of the public health equation, the authors wrote.

The book also describes how leaders dealt with public criticism of their efforts and the spread of misinformation. It helped when community institutions joined forces to put out unified messages, admitted to uncertainty and acknowledged that guidance sometimes changes in the face of new information. It also helped when they showed up and truly listened to community concerns. And, in some circumstances, the best approach was to avoid amplifying misleading claims by debating them. Instead, the most effective teams remained committed to their essential messages.

To keep kids in school, safe and learning during the next public health crisis, the authors urge communities to continue the partnerships that developed during the COVID-19 pandemic. Building and maintaining those relationships and their outreach to the community is foundational to surviving and navigating the next crisis in K-12 schools, they wrote.

 

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Editor’s note:  

The book “K-12 Schools and Public Health Partnerships: Strategies for Navigating a Crisis with Trust, Equity, and Communication” is available for purchase online.


A new fossil face sheds light on early migrations of ancient human ancestor

A 1.5-million-year-old fossil from Gona, Ethiopia reveals new details about the first hominin species to disperse from Africa.


Midwestern University

New face reconstruction from Ethiopia provides insights into origins and early migration of human ancestors 

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Map showing potential migration routes of the human ancestor, Homo erectus, in Africa, Europe and Asia during the early Pleistocene. Key fossils of Homo erectus and the earlier Homo habilis species are shown, including the new face reconstruction of the DAN5 fossil from Gona, Ethiopia dated to 1.5 million years ago.

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Credit: Dr. Karen L. Baab. Scans provided by National Museum of Ethiopia, National Museums of Kenya and Georgian National Museum.





 


A 1.5-million-year-old fossil from Gona, Ethiopia reveals new details about the first hominin species to disperse from Africa.

Summary: Virtual reassembly of teeth and fossil bone fragments reveals a beautifully preserved face of a 1.5-million-year-old human ancestor—the first complete Early Pleistocene hominin cranium from the Horn of Africa. This fossil, from Gona, Ethiopia, hints at a surprisingly archaic face in the earliest human ancestors to migrate out of Africa.

Publication: Nature Communications (https://www.nature.com/articles/s41467-025-66381-9)

 

A team of international scientists, led by Dr. Karen Baab, a paleoanthropologist at the College of Graduate Studies, Glendale Campus of Midwestern University in Arizona, produced a virtual reconstruction of the face of early Homo erectus. The 1.5 to 1.6 million-year-old fossil, called DAN5, was found at the site of Gona, in the Afar region of Ethiopia. This surprisingly archaic face yields new insights into the first species to spread across Africa and Eurasia. The team’s findings are being published in Nature Communications.

According to Dr. Baab, “We already knew that the DAN5 fossil had a small brain, but this new reconstruction shows that the face is also more primitive than classic African Homo erectus of the same antiquity. One explanation is that the Gona population retained the anatomy of the population that originally migrated out of Africa approximately 300,000 years earlier.”

Gona, Ethiopia

The Gona Paleoanthropological Research Project in the Afar of Ethiopia is co-directed by Dr. Sileshi Semaw (Centro Nacional de Investigación sobre la Evolución Humana, Spain) and Dr. Michael Rogers (Southern Connecticut State University). Gona has yielded hominin fossils that are older than 6.3 million years ago, and stone tools spanning the last 2.6 million years of human evolution. The newly presented hominin reconstruction includes a fossil brain case (previously described in 2020) and smaller fragments of the face belonging to a single individual called DAN5 dated to between 1.6 and 1.5 million years ago. The face fragments (and teeth) have now been reassembled using virtual techniques to generate the most complete skull of a fossil human from the Horn of Africa in this time period. The DAN5 fossil is assigned to Homo erectus, a long-lived species found throughout Africa, Asia, and Europe after approximately 1.8 million years ago.

How did the scientists reconstruct the DAN5 fossil?

The researchers used high-resolution micro-CT scans of the four major fragments of the face, which were recovered during the 2000 fieldwork at Gona. 3D models of the fragments were generated from the CT scans. The face fragments were then re-pieced together on a computer screen, and the teeth were fit into the upper jaw where possible. The final step was “attaching” the face to the braincase to produce a mostly complete cranium. This reconstruction took about a year and went through several iterations before arriving at the final version.

Dr. Baab, who was responsible for the reconstruction, described this as “a very complicated 3D puzzle, and one where you do not know the exact outcome in advance. Fortunately, we do know how faces fit together in general, so we were not starting from scratch.”

What did scientists conclude?

This new study shows that the Gona population 1.5 million years ago had a mix of typical Homo erectus characters concentrated in its braincase, but more ancestral features of the face and teeth normally only seen in earlier species. For example, the bridge of the nose is quite flat, and the molars are large. Scientists determined this by comparing the size and shape of the DAN5 face and teeth with other fossils of the same geological age, as well as older and younger ones. A similar combination of traits was documented previously in Eurasia, but this is the first fossil to show this combination of traits inside Africa, challenging the idea that Homo erectus evolved outside of the continent. “I'll never forget the shock I felt when Dr. Baab first showed me the reconstructed face and jaw,” says Dr. Yousuke Kaifu of the University of Tokyo, a co-author of the study.

“The oldest fossils belonging to Homo erectus are from Africa, and the new fossil reconstruction shows that transitional fossils also existed there, so it makes sense that this species emerged on the African continent,” says Dr. Baab. “But the DAN5 fossil postdates the initial exit from Africa, so other interpretations are possible.”

Dr. Rogers agrees. “This newly reconstructed cranium further emphasizes the anatomical diversity seen in early members of our genus, which is only likely to increase with future discoveries.”

“It is remarkable that the DAN5 Homo erectus was making both simple Oldowan stone tools and early Acheulian handaxes, among the earliest evidence for the two stone tool traditions to be found directly associated with a hominin fossil,” adds Dr. Semaw.

Future Research

The researchers are hoping to compare this fossil to the earliest human fossils from Europe, including fossils assigned to Homo erectus but also a distinct species, Homo antecessor, both dated to approximately one million years ago. "Comparing DAN5 to these fossils will not only deepen our understanding of facial variability within Homo erectus but also shed light on how the species adapted and evolved," explains Dr. Sarah Freidline of the University of Central Florida, study co-author.

There is also potential to test alternative evolutionary scenarios, such as genetone to two million years ago to sort this out.”

Virtual reconstruction of fossil face of 1.5 million-year-old human ancestor


Photo montage of five major elements of DAN5 fossil cranium.Photo montage of five major elements of DAN5 fossil cranium.

Credit

Dr. Michael Rogers


Phone: +1 (623) 572-3737

Contrails are a major driver of aviation’s climate impact




Chalmers University of Technology
Contrails are a major driver of aviation’s climate impact 

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Aviation’s climate impact extends beyond carbon dioxide emissions. A new study from Chalmers University of Technology and the University of Gothenburg, Sweden, and Imperial College, UK, reveals that contrails can represent a significant portion of aviation’s overall climate cost. The study also shows that climate impact can be reduced by optimising flight routes.

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Credit: Wikimedia Commons, CC BY-SA 2.5 | André Karwath





Aviation’s climate impact extends beyond carbon dioxide emissions. A new study from Chalmers University of Technology and the University of Gothenburg, Sweden, and Imperial College, UK, reveals that contrails can represent a significant portion of aviation’s overall climate cost. The study also shows that climate impact can be reduced by optimising flight routes.

In a new article in Nature Communications, The social costs of aviation CO and contrail cirrus, the researchers demonstrate that both CO₂ emissions and contrail formation contribute materially to aviation’s climate impact – and that the associated societal costs differ substantially depending on weather patterns and routing decisions. They find that, at the global level, contrails account for about 15 percent of aviation’s climate impact when measured in economic terms.

After also analysing nearly half a million flights across the North Atlantic, the research team has generated new insights that can support both industry and policymakers in guiding aviation towards more climate optimal operations. Drawing on extensive flight and meteorological data, in combination with a contrail model and an advanced climate-economy model, the researchers estimated the climate and societal cost attributable to each emission source.

“Our research provides a basis for strategies to reduce the climate impact of contrails. Our calculations can be used for optimisation of flight routes where climate impact is considered alongside, for example, fuel cost and travel time. The results give airline operators and air traffic management new tools for climate optimisation. This could bring significant climate and societal benefits,” says Susanne Pettersson, postdoctoral researcher at the Department of Space, Earth and Environment at Chalmers.

The study shows that 38 percent of flights generate contrails that have a warming effect. It also shows that it would be beneficial from a climate perspective to reduce the formation of contrails of almost all these flights through minor rerouting, to avoid contrail formation, even if this results in slightly higher carbon dioxide emissions.

“The new knowledge also provides a foundation for designing new regulations and policy instruments to reduce aviation’s climate impact. The European Commission is currently working on proposals to steer aviation towards lower climate impact, and our new study can hopefully support this process,” says Daniel Johansson, associate professor at the Department of Space, Earth and Environment at Chalmers and one of the lead authors of the next IPCC climate report.

Learn more on contrails, aviation and climate change: Read an article written by the researchers as a Resources For the Future (RFF) issue in brief.