The latest in the series, Deep Look, takes a close up peek at the fur of sea otters and why it is so good at keeping them warm in cold water.

“Sea otters aren’t just cute — they’re a vivid example of life on the edge. Unlike whales and other ocean mammals, sea otters have no blubber. Yet their body temperatures are twice as warm as the water they swim in. The secret to their survival? A fur coat like none other.”

I wrote about this new series a few months back at Scientific American.