Despite our best efforts, there are many species of animals that become extinct every year. There are thousands of species of ...

North American species like the Colorado potato beetle and the fall armyworm have become invasive elsewhere. Illustration by Marilyn Foehrenbach Q: In North America, we worry about invasive ...

T. rex was previously suspected to have evolved in Asia and migrated to North America, but new research shows that the direct ...

Birds are rapidly vanishing from North America, with dramatic population losses in places that were once thought safe.

A new study indicates the giant reptile Deinosuchus is not a close relative of modern alligators, as scientists previously ...

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the ...

Analysis of nearly 500 bird species across North America has found that three-quarters are declining across their ranges, with two-thirds of the total shrinking significantly. The study ...