Proceedings of the National Academy of Sciences, Volume 123, Issue 17, April 2026. <br/>SignificanceAdaptive cytotoxic T cells must eliminate pathogens while sparing healthy tissue, yet how response speed and magnitude arise from cellular decision rules remains unclear. Here, we formalize T cell immunity as a feedback-controlled program in … Source: Read Full Article
The dawn chorus at RSPB Northward Hill in Kent is a riot of sound: the melodic robin, the two-tone cuckoo, the whitethroat’s scratchy warble. Even the garbling geese and mooing cows from the neighbouring Thames marshes add to the symphony. Dawn chorus Dawn chorus Sorry your browser does not support audio – but you can…
Diving is physiologically challenging for marine animals. Long and deep dives can trigger “anaerobic” (oxygen-less) metabolism in organs other than the heart and brain that causes lactic acid to accumulate. Even though diving animals typically have evolved tricks to avoid “the bends,” nitrogen bubbles may nevertheless build up in their blood. They tend to recover…
Winter 2026 roared to an end in southern Alaska as parts of the coast saw below-normal temperatures and bouts of moderate to heavy snow. Viewed from above, the region’s atmospheric instability was apparent in the striking display of cloud formations just offshore. A NASA satellite captured this image of the clouds on March 19, 2026,…
Madeleine Finlay sits down with co-host and Guardian science editor Ian Sample to talk through three eye-catching stories from the week, including the news that the number of years people in the UK are spending in good health has declined compared with a decade ago. Also on the agenda is the science, tech and nutrition…
There is a troubling contradiction at the heart of the global transition to a cleaner, greener, tech-driven future: Modern technologies—everything from AI to wind turbines, as well as cellphones, electric vehicles and defense systems—depend on critical minerals. But many of the communities where those minerals are mined end up with polluted water and poorer health…
Paleontologists have descibed a new species of the multituberculate mammal genus Cimolodon based on a fossil found in Baja California, Mexico. An illustration of Cimolodon desosai on the tree with a fruit in its mouth. Image credit: Andrey Atuchin. The newly-described mammal species lived in what is now Mexico about 75 million years ago (Cretaceous…
Donald Trump hosted the crew of the historic Artemis II lunar flyby mission at the White House on Wednesday. The four astronauts – commander Reid Wiseman, pilot Victor Glover and mission specialists Christina Koch and Jeremy Hansen – joined the president in the Oval Office for a celebratory meeting and press conference. “We’re very proud…
A research team led by Prof. Zhang Jian at the Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, in collaboration with Prof. Xiao Chong from the University of Science and Technology of China and Prof. Zhang Yongsheng from Qufu Normal University, achieved a peak ZT value of 2.03 at…
Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Is there any real solution to the nightmare of online password management in an era of increasingly clever hacks, scams, and identity theft? Cybersecurity engineers at Texas A&M University think so, and according to their recent findings published in…
