Newly discovered 1.5-million-year-old footprints reveal how two extinct human species crossed paths within hours of each ...

Two species of ancient human relatives crossed paths 1.5 million years ago. Fossilized footprints in Kenya captured the ...

The apex predator was formerly thought to have been hunted into extinction from the park in the 1920s but has increasingly ...

Biologists at the University of Utah have conducted a comprehensive analysis identifying traits associated with all 216 bird ...

A 1.5-million-year-old lakebed from Kenya shows two ancient human relatives cohabitating an environment, shaking up our ...

Human footprints stir the imagination. They invite you to follow, to guess what someone was doing and where they were going.

"To have them back on the landscape after being gone for so long, it's really bringing back that native part of the landscape ...

Researchers believe that the extinct human species lived in small groups, which might have made them susceptible to ...

Two species of ancient humans walked beside each other 1.5 million years ago, fossil footprints have revealed.

Giraffe populations are declining at such an alarming rate — from habitat loss, poaching, urbanization and climate ...

Populations of subspecies of northern giraffes have declined approximately 77% since 1985, from 25,653 to 5,919 individuals.

The U.S. Fish and Wildlife Service has proposed new protections for giraffes, saying their populations are threatened by ...