Blue Whale: The Largest Animal In History, Alive Or Extinct?

The blue whale, the largest animal alive today, is also the largest ever recorded in history. Growing up to 110 feet and weighing 190 tonnes, blue whales have a heart the size of a car and a tongue as heavy as an elephant. Not only are they the heaviest and longest, but also the loudest creatures on Earth. Interestingly, they evolved from four-legged land animals.