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4/26
The idea of growing replacement tissue to repair an organ, or to swap it out for an entirely new one, is rapidly transitioning from science fiction to fact.
The heart maintains a careful balancing act; too soft and it won’t pump blood, but too hard and it will overtax itself and stop entirely. There is an optimal amount of strain that a beating heart can generate and still beat at its usual rate, once per second.
The body is structured to ensure that any invading organisms have a tough time reaching the brain, an organ obviously critical to survival. Known as the blood-brain barrier, cells that line the brain and spinal cord are tightly packed, making it difficult for anything besides very small molecules to cross from the bloodstream into the central nervous system.
The University of Pennsylvania, through its Center for Technology Transfer and its UPstart company formation program, has announced a new partnership with IP Group PLC, developer of intellectual property-based businesses.
Using a video game in which people navigate through a virtual town delivering objects to specific locations, a team of neuroscientists from the University of Pennsylvania and Freiburg University has discovered how brain cells that encode spatial information form “geotags” for specific memories and are activated immediately before those memories are recalled.
WHO: Alison Sweeney Assistant Professor of Physics
Five faculty members from the University of Pennsylvania have been named fellows of the American Association for the Advancement of Science.
The blood stem cells that live in bone marrow are at the top of a complex family tree. Such stem cells split and divide down various pathways that ultimately produce red cells, white cells and platelets.
The instructions for building all of the body’s proteins are contained in a person’s DNA, a string of chemicals that, if unwound and strung end to end, would form a sentence 3 billion letters long.
Evolution does not operate with a goal in mind; it does not have foresight. But organisms that have a greater capacity to evolve may fare better in rapidly changing environments. This raises the question: does evolution favor characteristics that increase a species’ ability to evolve?
A research team led by Michael Mann of the School of Arts & Sciences is predicting the upcoming Atlantic hurricane season will produce the most named storms on record, fueled by exceptionally warm ocean waters and an expected shift from El Niño to La Niña.
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The “My Climate Story” project at the Environmental Humanities Department helps students and teachers learn about climate change’s impact in everyday backyards, with remarks from Bethany Wiggin. The idea is credited to María Villarreal, a College of Arts and Sciences second-year from Tampico, Mexico.
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Benjamin Lee of the School of Engineering and Applied Science says that hardware and infrastructure costs are growing at high rates for generative AI.
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Michael Mann of the School of Arts & Sciences explains how three low-pressure systems formed a train of storms that battered the United Arab Emirates.
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Michael Mann of the School of Arts & Sciences says that many people blaming cloud seeding for Dubai storms are climate change deniers trying to divert attention from what’s really happening.
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Chris Callison-Burch of the School of Engineering and Applied Science says that auto-regressive generation can make it difficult for language learning models to perform fact-based or symbolic reasoning.
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Michael Mann of the School of Arts & Sciences says that persistent summer weather extremes like heat waves are becoming more common as people continue to warm the planet with carbon pollution.
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Benjamin Lee of the School of Engineering and Applied Science says that the electrical grid will have to figure out how to match supply and demand during brief windows where the energy source goes away.
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Michael Mann of the School of Arts & Sciences says that tendencies to exaggerate climate science in favor of “doomist” narratives helps no one except the fossil fuel industry.
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Michael Mann of the School of Arts & Sciences says that plant-flowering, tree-leafing, and egg-hatching are all markers associated with spring that are happening sooner.
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