Even bigger than dinosaur, blue whale is the biggest creature that ever to exist on earth

News24xx.com - Much larger than any type of dinosaur, blue whale is the largest animal ever. Adult blue whales can reach 30 m in length and weigh more than 180,000 kg - about the same size as 40 elephants, 30 Tyrannosaurus Rex, or 2,700 average-sized humans.

Who's the giant among the giants starts from something much smaller. Like all whales, Blue Whales (Balaenopteramusculus) evolved from four-legged mammals that lived on land about 48 million years ago.

This ancient ancestor, Pakicetus, only has a length of 1.8m. He lives on the river and some of his offspring adapt to life in water which eventually gave birth to a fully aquatic creature called Dorudon ("Spear Tooth"), which lived 37 million years ago with a length of 4.5m.

At Dorudon, we see the beginning that makes whales so special. Its nostrils retreated from its snout to the top of its head, its front legs became stiff fins, its body extended, its hind legs disappeared and his tail evolved into two elastic anchors, which pushed the animal forward through up and down motion in the water, not side-to-side movements - fish tail side.

News24xx.com/fik/red