Sea otters are known for using tools, but not all of them do. A new study finds those that use tools have better survival odds in a world where their traditional food sources are changing.

Among the diverse and fascinating behaviors in the animal kingdom, tool use has long been considered a hallmark of advanced cognition. While we often associate tool usage with primates like ...

Some otters rely on tools to bust open hard-shelled prey items like snails, and a new study suggests this tool use is helping them to survive as their favorite, easier-to-eat foods disappear.