Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors. Palca is also the founder of NPR Scicommers – A science communication collective.
South Korea's parliament voted Saturday to impeach President Yoon Suk Yeol as authorities investigate allegations of rebellion over his controversial Dec. 3 martial law decree.
Travis Timmerman, a U.S. citizen found wandering barefoot in Damascus after being freed from a Syrian prison following the fall of the Assad regime, was handed over to U.S. forces in Syria on Friday.
Calgary took fluoride out of its water supply in 2011, but it's reversing course. City council member Gian-Carlo Carra explains why he voted to remove fluoride and why he would vote differently today.