Throughout evolution, there has been a largest species, but whether or not the all-timer still exists is the question.

While it is not quite as big as a Tyrannosaurus rex skeleton, fossilized poop can help paleontologists recreate lost worlds.

Any eagle species that is alive in the present ... and so it became the apex predator in the landscape of prehistoric New Zealand. The bird was the largest in its environment; hence it hunted ...

2.7 degrees (where current policies and pledges get us): 5 percent of species ...

Conservationists say five Hawaiian crows have been released on Maui for the first time as part of an ongoing effort to return ...