Drone footage has captured killer whales breaking off stalks of kelp and rubbing the pieces on other orcas, a rare case of ...

The whales use quick body movements to tear pieces of bull kelp for use as tools, perhaps the first known toolmaking by a marine mammal.

Killer whales have been seen detaching lengths of seaweed and using them to massage each other—the first evidence of ...

Thanks to new drone footage, killer whales have joined an exclusive club: the short list of animals that make and use tools.

Minutes' newest correspondent filed her first report from Dominica where she reported on the threatened population of sperm ...