New research shows southern resident killer whales grooming each other using kelp they’ve modified, and researchers think it’s the first time researchers have documented marine mammals making tools.

In a new sign of toolmaking in marine mammals, orcas in the Pacific Northwest were recorded rubbing stalks of kelp against each other’s bodies, a study shows. By Jacey Fortin A hundred feet or more ...

The more we learn about orcas, the more remarkable they are. These giant dolphins are the ocean's true apex predator, preying on great white sharks and other lesser predators. But for all their ...

Orcas off the west coast of North America are grooming each other with kelp, in a rare sighting of marine mammals manufacturing and using tools. For several years, scientists have been keenly ...

Courtesy: SeaDoc Society, Center for Whale Research, and San Diego Zoo Wildlife Alliance under NOAA Permit #26288-01 The orca J pod has been very active in Central Puget Sound waters Friday, and ...

Climate Lab is a Seattle Times initiative that explores the effects of climate change in the Pacific Northwest and beyond. The project is funded in part by The Bullitt Foundation, CO2 Foundation, Jim ...

An endangered orca identified as J36 was seen carrying its dead newborn calf through Washington state waters on Friday, marking the second such troubling occurrence this year among the critically ...

Vanessa Pirotta does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...