Top news for December 21, 2008

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Gilead Agrees to Allow Generic Version of Groundbreaking H.I.V. Shot in Poor Countries

Antarctica is ‘greening’ at dramatic rate as climate heats

Webb Telescope’s Encounter With a Time-Bending Supernova: Rewriting Cosmic Rules

Remarkably Effective: New Nasal Spray Shows Promise in Blocking COVID-19, Flu, and Common Cold Viruses

Taiwan Makes the Majority of the World’s Computer Chips. Now It’s Running Out of Electricity

New Fossil Discoveries Overturn Old Ideas of Mammal Evolution

Science Made Simple: What Are Light Sources?

Shapley Supercluster Discovery Shatters Previous Cosmic Boundaries

Rwanda’s Doctors and Nurses Hit Hard by Deadly Marburg Virus

Scientists Discover Mysterious Modern Underwater Ice Structures on Arctic Seafloor