An offshoot of a group from Oxford, England, Philly’s Knitwits meet weekly to drink, yap, and work on fiber arts projects.

For years, I have been interested in disorders in which patients experience very real symptoms even though conventional brain imaging may look normal. Molecular imaging has taught me a simple lesson: ...

Scientists analyze an accidental SpaceX impact on the moon as cyberattacks target U.S. water systems and a new mRNA flu vaccine is approved by the FDA ...