The 19th-century naturalist Alfred Russel Wallace created a visualization that tied different species to specific regions of the world.
Paleontologists recently solved the riddle of whether two fossil specimens were young T. rexes or a whole different species.
Trump's border wall threatens habitats in Arizona's Sonoran Desert. What happened when the area was bulldozed in the 1950s?
But one hasn't been seen in the U.S. since 1995, not long after the end of the last reintroduction program.
The international popularity of tequila threatens the quantity, health, and biodiversity of all species of agave.
A midden is, among other things, a refuse site outside an octopus' home. (Release the Køkkenmødding!)
We won't solve all of the pressing environmental problems, but we can help mitigate some.
Lichens often go unnoticed, living on the ground, on tree trunks, or on rocks. They're hearty, but remarkably sensitive to air pollution.
The exchange of cancerous cells between organisms is rare. Scientist studied how it happened across species of mussels.
A report from the Australian Koala Foundation declaring koalas "functionally extinct" has caused a confusing scare. What does it mean?