Once a caterpillar has disintegrated all of its tissues except for the imaginal discs, those discs use the protein-rich soup all around them to fuel the rapid cell division required to form the wings, antennae, legs, eyes, genitals and all the other features of an adult butterfly or moth.
View full size image. Diving to depths of 328 feet (100 meters) to munch on millions of krill each day, the blue whale takes the prize for the largest creature alive (and ever to exist!). These blue-gray giants extend about 80 to 100 feet (24.4 to 30.5 m) in length and weigh about 400,000 pounds (181,437 kilograms).
Blue whales are thought to be the largest animal ever to live on the Earth. They reach lengths up to about 100 feet and weights of an amazing 100-150 tons. Blue whales are a type of baleen whale known as a rorqual.