“The strong jaws suggest that the primitive otter probably did not have the tool-using capability, and combined with the giant size, it was likely a top predator.” The study was funded by the U.S.

And shrews are fearsome predators. Turns out some of the most ... shaped receptors that fend off the toxins. Next up, the giant otter. On average, they’re about as long as a human man is tall.

Adorably fuzzy sea otters aren’t just cute. The marine mammals serve a crucial role, helping to restore the giant kelp forests they rely on by removing their top predators, the sea urchins.