Scientists have found a group of worms that haven't reproduced sexually for 18 million years. Normally that would be a recipe for quick extinction, but these little guys seem none the worse for wear.
Researchers are startled to find that pumas, also called mountain lions, meet up quite frequently with their fellow big cats — perhaps to share an elk carcass.
A new study of how birds react to the annual light tribute to September 11th in New York City provides compelling evidence for how artificial light can disorient large numbers of migrating birds.
The mayor wanted to bring in three falcons and two hawks to scare the pigeons off. About 20,000 people have signed a petition to keep the birds of prey away.
A new book profiles some of the world's most fascinating felines, while telling how their job descriptions have evolved from rodent catchers to today's ambassadors for distilleries and breweries.
Iguanas lost their habitat because of Hurricane Irma. That could mean disease-carrying mosquitoes, which are food for the lizards, could multiply faster.
NPR's Ailsa Chang talks with Greg Ruiz, a marine ecologist at the Smithsonian Environmental Research Center, about nearly 300 Japanese marine coastal species that traveled across the Pacific Ocean.
Apes' intelligence tests vary so much from kids' that comparative results may be invalid. Anthropologist Barbara J. King explores new insights from psychology.
The Guggenheim Museum in New York City announced late Monday night that it would be withdrawing three works from an upcoming exhibition of contemporary Chinese art over protests from animal rights groups.