Killer whales are expanding their territory and have moved into Arctic waters as climate change melts sea ice, with two genetically distinct populations being identified by Canadian scientists.

The bowhead whale (Balaena mysticetus) is found in the icy waters of the Arctic. These are the longest-living mammals; some ...

Researchers prefer to speak of encounters and interactions rather than attacks and assume that the orcas do not act with ...

An orca that made headlines for carrying a dead calf for more than two weeks in 2018 is doing it again after the death of her new calf.

Compelling essays, rigorous investigations, and four days in a pitch-black cave: this is our greatest work of the year ...

Killer whales are shown in the Eastern Canadian Arctic in this undated handout photo. Killer whales are expanding their territory and have moved into Arctic waters as climate change melts sea ice ...

The study says the orcas could also affect humans, by "adding top-down pressure on Arctic food webs crucial to northern communities' social and economic well-being." It says killer whales in the ...