We humans think we don't have a very good sense of smell. But psychologist Alexandra Horowitz says dogs can show us how to train our noses so they give us a window into a secret world.
Scientists who found the fossils believe they are the remains of five people and far older than all previous finds. But how do the remains really fit into the bushy family tree of modern humans?
Right now, the government rents farmland to help protect soil and water. But once the land is farmed again, the benefits disappear. Environmentalists want to change that.
Scientists and activists in India are training citizens to collect information on water issues like contamination — and upload it so it can be used to push for change.
Join NPR's Madeline Sofia on a tour of the largest collection of whale bones in the world. Curator Nick Pyenson takes us backstage to see Smithsonian specimens that aren't on display in museums.
In Latin America, they drink the blood of big animals and can spread rabies. Livestock die. So do people. Ranchers want to wipe the bats out. Does anyone think that's a bad idea?
Paul Nicklen has spent decades documenting the Arctic and the Antarctic. "I want people to realize that ice is like the soil in the garden," he says. "Without ice the polar regions cannot exist."