Comparing Sperm Whales To Sperm: A Swimming Contest

Ready, get set, go! Let's compare a sperm whale plowing through the ocean to a human sperm plowing through a glass of water: The whale barely notices the water it's in; the sperm — oh, gee — it's got a problem. How it solves that problem — being much closer to the size of the water molecules around it — is ... well, masterful.