All animals are awesome, of course. But if we are rating by size nothing beats the Blue Whale. They grow as long as three school busses parked end to end and weigh as much as a four-bedroom house. (And sadly, as much as the trash left on the moon.) Their heart alone weighs more than my Toyota Prius and their arteries are so big we could swim in them. Hardly a tidbit, but totally awesome for sure.