As children, many of us learn about the wondrous process by which a caterpillar morphs into a butterfly. The story usually begins with a very hungry caterpillar hatching from an egg.
The Largest Animal Ever: The Blue Whale. The blue whale (Balaenoptera musculus) is a marine mammal belonging to the suborder of baleen whales. At 30 metres (98 ft) in length and 180 metric tons (200 short tons) or more in weight, it is the largest known animal to have ever existed.
Tallest Animal. The Blue Whale: The Blue Whale with 30 metres in length and 170 tonnes or more in weight is the largest known animal in the earth. This largest animal in the earth can eat 4 to 8 tons (3.6 to 7.3 metric tons) of krill per day.