Sea otters have a way of making even basic survival look ridiculously comfortable. Floating on their backs with paws tucked against their bellies, drifting beside companions, or wrapping themselves in kelp, they often look like they’ve perfected the art of taking it easy. But many of those charming habits have very practical explanations. From conserving body heat to staying close to a raft and keeping from drifting away, sea otters have turned everyday adaptations into some of the most endearing behavior in the animal world. Animals