When researcher Jared Towers set up his cameras underwater to observe a pair of killer whales, he saw something strange.

This is part of Revenge Week, a series about how vengeance runs America, from the White House to cheating spouses to that bad ...

Haight listed several popular viewpoints in Pierce County for seeing the whales: ...

Prior to this instance, the “tongue-nibbling” had only been observed a handful of times in captivity. First seen in captive ...

Researchers documented 34 instances of purported prey-sharing behavior, which suggests orcas may be altruistic and capable of ...

Orcas were spotted using kelp as a grooming tool on each other, the first known use of tools among cetaceans for something ...

Orcas often share food with each other—it’s a prosocial activity and a way that they build relationships with each other,” ...

Wild orcas occasionally approach humans and offer us food, according to a new study — but scientists aren't sure why.

The apex predators have offered up fish, birds, turtles and whales to humans around the world, according to the study.

Efforts to save the Northwest’s endangered orcas are not working on either side of the U.S.-Canada border, according to an ...

Once thriving, there are now believed to be just 73 Southern Resident killer whales left in Washington state's Puget Sound.