Blue whale's tongue weighs as much as an elephant
Blue whales, which are the largest animals known to have lived on the Earth, have tongues that can weigh as much as an elephant, at about 2,700 kilograms. The blue whale itself can weigh up to 1,80,000 kilograms. Also listed among Earth's longest-lived animals, the average lifespan of a blue whale is estimated to be around 80 to 90 years.