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, ...

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 ...

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 ...

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 ...

Some of the best known species on Earth may not be what they seem. Credit...Steve Holroyd/Alamy Supported by By Carl Zimmer Naturalists have been trying for centuries to catalog all of the species on ...

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 ...

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...

A species is a distinct group of organisms and the most basic unit used to measure life on Earth. However, there’s no single definition of a species, meaning this vital concept in biology can be ...