Scientists have spotted a subset of killer whales using seaweed to scratch each other’s backs, marking the first known ...

The killer whales are using a kind of marine loofah to exfoliate. Rubbing the kelp between their bodies is a form of mutual grooming, and quite possibly, the first documented tool use for social ...

A new study reveals killer whales fashion kelp into tools and use them to groom each other, a possible first for marine ...