Some animals matter so much to their ecosystems that losing them is like removing the keystone from an arch—the entire ...

When a species comes off the Endangered Species Act list, is that the end of the story? No. While a win is a win, it’s never the end; responsibility for these species often shifts to states, Tribes, ...

About 300 years ago, Swedish naturalist Carl Linnaeus set out on a bold quest: to identify and name every living organism on ...

New species are being discovered faster than ever before — at a rate of more than 16,000 every year, suggests a new study.

Imagine looking up at a sky so full of birds, they block out light from the sun. Passenger pigeons (Ectopistes migratorius) used to fly in flocks of hundreds of millions, maybe even billions, of birds ...

When species interact with each other, they do not evolve separately, but do so together. This process is called coevolution. Natural selection favors predators that are better at capturing prey, and ...

Over the years, we’ve turned research, anecdotes and everyday experiences into a whole constellation of stories about the way we impact our world. Still, some voices may be missing from the ...

The animal kingdom is a wonderful and wacky place filled with creatures with all sorts of unique abilities, ranging from walking on water, holding their breath miles beneath the ocean and even living ...

People sometimes introduce animals and plants into new areas. When these harm their new environment, we call them invasive species. In some places, invasive species have changed the natural world ...