CNN — When sea otters hammer mussel shells against rocks to help open them, they're leaving behind their own archaeological record that can't be compared to any other creature, according to a new ...

Add Yahoo as a preferred source to see more of our stories on Google. Sea otters are highly intelligent marine creatures. Their intelligence is shown by their inquisitiveness and their use of tools.

Sea otters are one of nature’s most fascinating creatures, beloved for their playful personalities and critical role in marine ecosystems. From their dense fur to their impressive tool use, these ...

Otters are among the few animals known to use tools while feeding. From cracking shellfish with stones to storing favourite ...

Southern sea otters living along California’s coast are struggling in warmer seas, with new threats and changing food sources. They, like the other two sea otter subspecies, are classified as ...