1 Click it to lock the touch's screen, or to wake it up. 2  Hold it down for a few seconds to turn the touch on and off. 3  You'll also use it, along with the Home button, to restart the touch. 4  Home Button-This button at the bottom center of the touch's face has many functions.
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.
How big is a Blue Whale? The blue whale may be the largest animal ever to inhabit the earth. It may have reached lengths of up to 31 meters (100 feet)--roughly the length of a basketball court. Blue whales have weighed up to 146 metric tonnes (160 tons). They feed on small shrimp-like crustaceans. The whales consume up to eight tons of these animals a day during their feeding period.