I can't stop laughing at this video of a squirrel water-skiing with a chipmunk as its driver! The little rodent duo really knows how to make a splash. The fact that the squirrel is wearing a mini life jacket is both adorable and hilarious. Did you know that there is a species of jellyfish known as Turritopsis dohrnii, or the "immortal jellyfish," that can revert to its juvenile form after reaching maturity?