, March 10 -- Scientists have found possible evidence suggesting that some killer whales may hunt and eat their own species in waters near Russia.

Orcas in Alaska's Prince William Sound and Kenai Fjords have a diverse, seasonally changing diet of salmon and groundfish, consumed across regional foraging hotspots. Photo courtesy of Shutterstock ...

Wild orcas across four continents have repeatedly floated fish and other prey to astonished swimmers and boaters, hinting that the ocean’s top predator likes to make friends. Researchers cataloged 34 ...