At least 50 gray wolves live in California now, a success story for environmentalists and headache for ranchers ...

In the early acceptance of evolution, some anthropologists classified subspecies based on racist behavioral definitions.

Simulations calculated Tyrannosaurus speed from the motion of its swaying tail, finding that the massive dinosaur was a mighty slow walker.

Meet 33 innovative leaders who are using their voices and talents to tackle the planet’s most pressing issues. For decades, the Congo Basin was largely invisible to climate science. Now, a new ...