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Ghost sharks grow forehead teeth to help them have sex

Male “ghost sharks” — eerie deep-sea fish known as chimaeras that are related to sharks and rays — have a strange rod jutting from their foreheads, studded with sharp, retractable teeth. New research reveals these are not merely lookalikes, but real rows of teeth that grow outside the mouth. What’s more, the toothy appendage is likely used for mating. Found only in males, the forehead rod — called a tenaculum — is the ghost sharks’ only source of distinct teeth, and it seems to be used to grasp females in much the same way sharks use their toothy mouths in mating. “If these strange chimaeras are sticking teeth on the front of their head, it makes you think about the dynamism of tooth development more generally,” said Gareth Fraser, Ph.D., a professor of biology at the University of Florida and senior author of the study. “If chimaeras can make a set of teeth outside the mouth, where else might we find teeth?” The team, including scientists from the University of Washington and the University of Chicago, studied both fossils and living specimens to solve the mystery. A 315-million-year-old fossil showed the tenaculum attached to the upper jaw, bearing teeth incredibly similar to those in the mouth. Modern chimaeras collected from Puget Sound revealed the same tooth-growing process on the head, seen in modern-day shark jaws. And genetic testing confirmed they expressed the same tooth-specific genes as oral teeth. “What we found is that the teeth on this strange appendage look very much like rows of shark teeth. The ability to make teeth transferred onto that appendage, likely from the mouth,” Fraser said. “Over time, the tenaculum shortened but retained the ability to make oral teeth on this forehead appendage.” Fraser collaborated with Washington’s Karly Cohen, Ph.D., and Michael Coates, Ph.D., from Chicago on the study, which was published this week in the Proceedings of the National Academy of Sciences. As experts in shark evolution and anatomy, the scientists were intrigued by these tooth-filled rods sprouting from the ghost shark foreheads. The central mystery: Is the tenaculum covered in true teeth related to oral teeth or more similar to the tooth-like scales plastering the skin of sharks and some ghost sharks? CT scans of the fossils and modern chimaeras gave the scientists unprecedented, detailed insights into the development of the tenaculum teeth, which looked remarkably similar to the teeth of today’s sharks. The nail in the coffin came from genetic evidence. The tenaculum teeth express genes found only in true teeth, never in shark skin denticles. "What I think is very neat about this project is that it provides a beautiful example of evolutionary tinkering or ‘bricolage,’” said Coates, a professor of biology at the University of Chicago. “We have a combination of experimental data with paleontological evidence to show how these fishes co-opted a preexisting program for manufacturing teeth to make a new device that is essential for reproduction." Cohen, a postdoctoral researcher at the University of Washington’s Friday Harbor Labs and first author of the paper, said scientists had never spotted teeth outside the mouth in this way before. “The tenaculum is a developmental relic, not a bizarre one-off, and the first clear example of a toothed structure outside the jaw,” she said. The bizarre path from a mouth full of teeth to forehead teeth used for mating demonstrates the impressive flexibility of evolution, the researchers say, always ready to repurpose structures for strange and unexpected new uses. “There are still plenty of surprises down in the ocean depths that we have yet to uncover,” Fraser said.

Finding joy in learning: How lighthearted moments transform English as a Foreign Language classrooms

In classrooms, not every meaningful learning moment can be planned. At the University of Delaware, educator and researcher Chad Davidson is exploring how spontaneous, lighthearted interactions between teachers and students can open the door to deeper understanding in real time. His recent paper in Language Teaching and Educational Research, "Exploring Spontaneous Acts of Lightheartedness in EFL Classrooms: A Reflective Duoethnography", examines how these unscripted moments – rooted in trust, positivity and a willingness to embrace the unexpected – help create environments where students feel comfortable taking the risks essential to learning. In this Q&A, Davidson discusses the inspiration behind his research, what he’s discovered about these classroom dynamics and how they could shape teaching practices moving forward. Q: What is the focus of this research, and why is it important? Davidson: Spontaneous acts of lightheartedness promote real-time learning because it's being open to the unknown in positive ways since the true dynamic of every classroom brings continuous unknowns: A teacher never knows 100% how the students will react (these students, in these moods, on this day, etc.), how quickly they will learn or pick up on something or not. A teacher, hence, spontaneously responds in real-time to the until-then-unknown student reactions in order for those particular students best to then grasp the concept or skill that is the present goal (or “learning objective”) that those students grasp. The hope is that the teacher's spontaneous response (as it often is with many teachers) is positive and lighthearted in order to foster students to also be open to such unpredictability in the classroom and to foster students' comfortability with the vulnerability to be open to taking spontaneous risks that are necessary for that transformation that we call learning – transforming from lack of knowledge to knowledge, from lack of understanding to understanding, from lack of mastery to further mastery. Q: What are some key findings or developments? Davidson: Realizing the essential features that make up spontaneous lighthearted classroom acts; for example, these acts must include trust of the student(s) and from the student(s), and the acts must have good-intentions of creating or maintaining a relaxed environment conducive to safely taking risks for potential learning. Q: How could this work potentially impact the field or the wider public? Davidson: This could foster this act type in classrooms. That is, hopefully more teacher-practitioners will allow themselves and their students to freely enact these in their daily in-class teaching/learning-attempts. Q: What are the next steps or upcoming milestones in your research? Davidson: We incorporated some valuable insights of Mexican philosopher Jorge Portilla. While there is a glut of usage of German, French, British and American philosophers, there is almost no usage of Hispanic or Latin American philosophers in education literature. It would be great to do more work that makes use of the profound thought in the works of Latin/Hispanic philosophers. For me, this would be continuing to go more deeply in applying Jorge Portilla's thought to philosophy of education, such as to classroom management. ABOUT CHAD DAVIDSON Instructor Chad C. Davidson has a Ph.D. in curriculum and instruction with an emphasis in philosophy of language education. He has 17 years of language teaching experience, primarily in teaching and curriculum creation for English for Academic Purposes at various colleges and universities across America (University of Delaware, Kansas State University, Georgia Tech, North Orange County Community College, Johnson County Community College), in Russia (Udmurt State University), and in Turkey (Mus Alparslan University). Moreover, he has studied languages at the following universities abroad: Universidad Autónoma de Guadalajara in Mexico, Universidade do Porto in Portugal, and Aristotle University of Thessaloniki in Greece. To speak with Davidson about his work and the importance of spontaneous acts of lightheartedness, reach out to MediaRelations@udel.edu.

Union Hospital Earns Healthgrades 2026 Patient Safety Excellence Award for Second Consecutive Year

Union Hospital has once again been ranked among the top 10% of hospitals nationwide, earning the 2026 Healthgrades Patient Safety Excellence Award™ for the second year in a row. In a landscape where many hospitals struggle to maintain consistency, Union Hospital is delivering a sustained streak of high reliability, driven by disciplined safety practices and a culture that puts patient protection first. Campus president Joan Pirrung captures it well: “Our caregivers are relentless about safety. Achieving this honor two years in a row shows the unwavering commitment they bring to every patient, every day.” At the heart of this repeat achievement is a team of caregivers who’ve built a culture where safety isn’t a program—it’s a daily practice. If you’re interested in the story behind these results, I can connect you with campus president Joan Pirrung for additional insight or interviews.

A year after liftoff: UF scientist reflects on historic space flight and the future of biology beyond Earth

One year after his pioneering flight aboard Blue Origin’s New Shepard rocket, University of Florida space biologist Rob Ferl, Ph.D., is still processing what it meant — not just for his career, but for science itself. “What stands out the most is just the overwhelming gratitude,” Ferl said. “It was such an amazing opportunity for a scientist to go to space and actually do science.” Ferl, a professor in UF’s Horticultural Sciences Department, Director of the Astraeus Space Institute, and Assistant Vice President of Research, became one of the first space biologists to fly alongside his own experiment — a moment that marked a new era in researcher-led missions. His suborbital journey provided a rare opportunity to study how terrestrial biology responds to the very first moments of spaceflight. “For decades, space biology has relied on professional astronauts to carry out experiments designed by scientists on Earth,” Ferl explained. “But to truly understand how biology works in space, I believe you - as the scientist - have to be there. You have to feel the environment.” This September, Ferl and longtime collaborator Anna-Lisa Paul, Ph.D., will be back at Blue Origin’s West Texas launch site, continuing their work with a new series of plant experiments. Ferl and Paul, who directs UF’s Interdisciplinary Center for Biotechnology Research and is a professor in Horticultural Sciences, are tracking fluorescently tagged genes in Arabidopsis plants to study how gene expression changes during the rapid shift from Earth’s gravity to the microgravity of spaceflight and back again. It’s a full-circle moment for Ferl, who remains deeply engaged in the same questions that sent him to space a year ago. Unpacking the Transition from Earth to Space Ferl’s experiment focused on the early metabolic responses of plants during the critical transition from Earth’s gravity to the weightlessness of space. “The scientific community has accumulated plenty of data comparing biology in orbit with that on Earth,” he said. “But we’ve known almost nothing about what happens in those first few minutes as organisms enter space and are exposed to microgravity.” Initial results from the flight reveal intense metabolic changes in the early moments of spaceflight. These changes are distinct from, but connected to, the long-term adaptations seen in orbit. Early Findings, Future Impact While the data from Ferl’s experiment are still on the way to being published, the findings are already shaping the direction of ongoing research. The work contributes to a growing understanding of how terrestrial life, from plants to humans, shares fundamental pathways in responding to the space environment. “This has real implications for the future of space missions,” Ferl noted. “As we send more people and more biology into space in support of exploration, we need a comprehensive understanding of how living systems adapt — right from the start.” Ferl and his team will return to Blue Origin’s launch site in Texas in September to continue their research, sending an uncrewed payload of plants into suborbital space. The flight carries no humans—but it does carry an automated experiment designed to advance their understanding of plant biology in space. It’s part of a broader effort to refine what Ferl calls “researcher-tended missions.” A New Course for UF Space Science The mission has not only shaped the trajectory of Ferl’s research, it has also energized Astraeus and the university’s space biology efforts. “This is about building a new kind of science culture,” Ferl said. “One where the scientists are embedded in every part of the mission, from experiment design to the moment of launch.” As the one-year anniversary of his flight approaches, Ferl remains focused on pushing the boundaries of what science in space can be. But he hasn’t forgotten the magnitude of the moment. “Even a year later,” he said, “the most powerful thing I feel is just: thank you. Thank you for the chance to go, to see it for myself, and to bring that knowledge back to Earth.”

It's Sports Science Week on The Academic Minute -- an entire week dedicated to UConn experts

The Academic Minute is a two-and-a-half minute daily brief featuring researchers from colleges and universities around the world, keeping listeners abreast of what’s new and exciting in the academy. A different professor is featured each day, offering updates on groundbreaking research and how it helps us better understand the world around us. Hosted by Dr. Lynn Pasquerella, president of the American Association of Colleges and Universities, The Academic Minute airs on 70 stations around the United States and Canada, and twice daily on it's home station WAMC - Northeast Public Radio. This week, the entire program was focused on the science of sport with a new featured UConn expert each day. Monday Julie P. Burland, director of research at the Institute for Sports Medicine, examines how to predict in-season injuries for athletes. Tuesday Jennifer B. Fields, Assistant Professor in the Department of Nutritional Sciences, investigates why so many young athletes are flunking nutrition. Wednesday Dimitris Xygalatas, associate professor of anthropology, looks at sports fans for clues on how social rituals bind us together. Thursday Rebecca L. Stearns, associate professor-in-residence in the Department of Kinesiology, details potential strategies to prevent sudden deaths in sports. Friday Robert Huggins, assistant professor in the Department of Kinesiology, examines why there aren’t more athletic trainers on-hand at sporting events.

West Michigan Home to Largest Temporary Butterfly Exhibit

We all look for signs of spring that herald the changing of seasons – buds bursting on trees, plants pushing out of the ground, and migratory birds returning. But there is another sure sign of spring, and it takes place annually at Frederik Meijer Gardens & Sculpture Park in Grand Rapids, Michigan – Fred & Dorothy Fichter Butterflies Are Blooming (March 1-April 30). The largest temporary tropical butterfly exhibition in the United States, Butterflies Are Blooming welcomes visitors into the 80-degree, five-story, 15,000-square-foot Lena Meijer Tropical Conservatory that is a paradise for thousands of butterflies flying freely all around. More than 7,000 chrysalides representing over 60 species travel to Frederik Meijer Gardens & Sculpture Park throughout the exhibit's duration from tropical countries including Belize, Brazil, Costa Rica, Ecuador, Kenya, Malaysia, and the Philippines. Steve LaWarre is the Senior Vice President at Frederik Meijer Gardens & Sculpture Park, where his visionary leadership and passion for botanical excellence have been instrumental in shaping Meijer Gardens' stunning landscapes and ensuring operational excellence. View his profile “Butterflies at Meijer Gardens is a quintessential springtime tradition for families across West Michigan and beyond, and we look forward to ushering in the start of our fourth decade of offering this magical tradition,” said Steve LaWarre, senior vice president at Meijer Gardens. Click on the link to learn more: 7,000 butterflies from 4 continents will soon fill Frederik Meijer Gardens, MLive, Feb. 17, 2026 The exhibition also offers guests up-close experiences at butterfly feeding stations, where tropical fruit slices and nectar-rich plants attract the butterflies, and at the Observation Station, where 1,200 chrysalides arrive at Meijer Gardens each week and transform into butterflies and moths. Additionally, the exhibition features vibrant floral displays, including arches of foliage and blooms in varied hues; unique nectar plant varieties; and colorful arrangements of air plants, bromeliads, and orchids. Guests also can visit the butterfly release stations to watch newly emerged butterflies make their debut and take their first flight as the stars of the show. “Guests can partake in everything from an immersive visit to the tropical conservatory with thousands of butterflies overhead, to a butterfly-themed program such as our new Bourbon & Butterflies events this year," said LaWarre. If you are looking to cover spring-related garden stories, including about Butterflies are Blooming, connect with Steve below.

Delaware emerges as a test bed for the future of AI in health care

Delaware is positioning itself as a “living lab” where academia, health systems and government collaborate to shape the future of artificial-intelligence-enabled health care.  The latest issue of the Delaware Journal of Public Health, guest edited by University of Delaware computer scientists Weisong Shi and Yixiang Deng, brings together 16 articles from researchers, clinicians, policymakers and industry leaders examining how AI and big data are reshaping health care. The issue, debuting this month, balances Delaware-specific topics with broader perspectives, highlighting three levels of impact: what Delaware can expect in the coming years, what other states can learn from Delaware’s approach and how UD research is advancing AI for health through collaborations. “At UD, we don’t work in isolation. We’re working closely with health care systems so that innovation happens together from the beginning,” says Shi, Alumni Distinguished Professor and Chair of UD’s Department of Computer and Information Sciences. Highlights from the issue include: The nation’s first nursing fellowship in robotics – ChristianaCare, Delaware’s largest health system, created an eight-month fellowship to train bedside nurses to conduct applied robotics research. Nurses who completed the program reported higher job satisfaction, improved well-being and greater professional confidence, suggesting programs like this may help retain the bedside workforce and reduce nationwide staffing shortages. Wheelchairs that navigate hospitals on their own – UD researchers developed a prototype autonomous wheelchair that combines onboard sensors and computing with software that interprets spoken directions from users, a step toward moving beyond systems that only work in controlled environments. To operate effectively in health care settings, the researchers say, wheelchairs must be able to navigate crowded hallways, interact with doors and elevators and recover safely when sensors or navigation systems fail. Smarter insulin dosing for type 1 diabetes – Researchers are developing computer models to predict blood sugar (glucose) trends and guide insulin delivery, but must address issues such as noisy data, reliable real-time prediction and the computational limits of wearable devices. A review by UD researchers and colleagues emphasizes the importance of interdisciplinary collaboration, standardized datasets, advances in computational infrastructure and clinical validation to turn these models into practical tools that improve patient care. To interview Shi about AI in health care and the new DJPH issue, click his profile or email MediaRelations@udel.edu. ABOUT WEISONG SHI Weisong Shi is an Alumni Distinguished Professor and Chair of the Department of Computer and Information Sciences at the University of Delaware. He leads the Connected and Autonomous Research Laboratory. He is an internationally renowned expert in edge computing, autonomous driving and connected health. His pioneering paper, “Edge Computing: Vision and Challenges,” has been cited over 10,000 times.

Iran Conflict Intensifies Focus on Affordability

Professor of Finance Anoop Rai spoke to Newsday about economic fallout from the Iran campaign, which is refocusing attention on rising costs at a time when affordability was already a top concern, locally and nationally. If the economy cools down, it could reduce the state’s tax revenues, and any actions lawmakers take to further help with affordability could lead to greater deficits, said Dr. Rai. “Then it becomes more like a philosophy. Do you help now during bad times and then try to recover later, or stick to your principles and say ‘tough luck’?”