Muskoxen survive in one of the harshest environments on Earth using a strategy that relies on cooperation rather than speed.

Bison once dominated vast stretches of North America before being driven to the edge of extinction in a matter of decades.

The parents of a disturbed airport traveler who was killed after crawling into an engine of a Delta plane have sued Salt Lake ...

The parents of a man who died after climbing into the engine of a plane at Salt Lake City International Airport are suing the city, claiming security systems should have prevented his death.