From poison frogs to worm-like caecilians, some amphibians are hardworking and surprisingly creative caregivers

A researcher weighs in on who’s accountable, when and why, in the eyes of the law — and whether the measures work as intended

Some make nests inside seashells, others tote bubbles of air on their backs. The spiders that went back to water evolved lots of slick survival strategies.

At the NFL’s Big Data Bowl, scientists compete to develop new stats that better capture player performance

Some people take too much, and too many get too little. Experts explain who needs D supplements, and why.

Diabetes, weight loss and now heart health: A new family of drugs is changing the way scientists are thinking about obesity — and more uses are on the horizon