(The Hill) – Scientists have spotted a subset of killer whales using seaweed to scratch each other’s backs, marking the first known identification of “tool” usage by marine mammals. The “southern ...

Killer whales have been seen detaching lengths of seaweed and using them to massage each other—the first evidence of tool-making by marine mammals. The whales bite off the end of a kelp stalk, ...

Orcas, also known as killer whales, have been documented using lengths of seaweed to scratch each other's backs, a new study suggests. Researchers observed the marine mammals detaching sections of ...

Killer whales have been seen detaching lengths of seaweed and using them to massage each other – the first evidence of tool-making by marine mammals. The whales bite off the end of a kelp stalk, ...