Koala fingerprints have been known to throw off detectives because they're so similar to human fingerprints. Sea lions and humans are the only two known mammals that can sync to a beat. About 3 percent of the ice in Antarctica is actually frozen penguin urine. The adorable platypus has spines on its back feet that release venom strong enough to cause swelling and inflammation in humans. A blue whale's tongue weighs around 7,000 pounds; twice the weight of the average car. The oldest domestic house cat ever recorded is a tabby mix named Creme Puff who lived 38 years and 3 days.