Hundreds of thousands of Sudanese refugees have fled to Chad, where they're facing increasingly difficult conditions as their presence strains local resources and humanitarian aid organizations.
New data samples from the Wuhan market points to an intermingling of SARS-CoV-2, raccoon dogs and humans. The authors of a new paper say it bolsters the animal origin theory. Other researchers object.
NPR's Juana Summers talks with Regina Barber and Emily Kwong of Short Wave about "scuba-diving" lizards, a trick to turn a mouse's skin transparent and whether finger counting helps kids' math skills.