Siberian Round-Bodied Flying Squirrel: Winter’s Perfect Sphere
This chubby little glider might be the roundest mammal alive. Their winter coat grows in so thick they practically disappear under it. All that fluff helps them survive brutal Siberian winters. Here’s something cool: before they jump between trees, they puff up their bodies with air. Picture a tennis ball with tiny feet launching itself across the forest. Their faces look like someone stuck a marble on a snowball. Most flying squirrels have longer faces, but these guys kept everything as round as possible.