Recent discoveries in fossils of a long-extinct whale have shown that the prehistoric mammal may have been the largest and heaviest animal ever to exist on Earth. Dubbed “the Leviathan”, this ancient behemoth may have weighed up to 183 tons (165,000 kilograms). That’s almost three times more than the heaviest known living animal, the blue… Continue reading Massive Extinct Whale May Be the Heaviest Animal Ever