Pythagorean Triple Square Day, as one man affectionately calls 9/16/25, is a day like no other this century.

Europe is warming faster than any continent. That's speeding up glacial melt, which is already threatening Europe's largest rivers.

Social media influencers claim that using lotion with magnesium promotes sleep. But there's little evidence magnesium taken in this way is effective.

Chlamydia in koalas can cause blindness, infertility and even death.

NPR's Scott Simon speaks to Prof. Anne Pringle, a mycologist at the University of Wisconsin, Madison, about the latest research on death cap mushrooms, revealing new information about the enigmatic fungus.

Research published this month found that even in pristine, untouched areas, insect populations are still on the decline. Climate change is a likely culprit.

Some 154 million people in the United States get health care through their employer — and for many, their costs are about to go way up.

Researchers have spent 10 years improving the massive detectors they use to catch shockwaves from colliding black holes. Now the science is precise enough to test one of Stephen Hawking's key ideas.

A Czech playwright introduced the word to English in the 1920s. But back then, it wasn't analogous to machinery. New interpretations of the robot reflect a modernity once skewered by the writer.

In New York City, officials are still working to identify the remains of people killed. Last month, three more victims were identified.