Kangaroos


 * A kangaroo cannot jump if its tail is not on the ground.
 * A newborn kangaroo is only about an inch long.
 * Large kangaroos can jump over 30 feet.
 * The largest living species of kangaroo has a head the size of a sheep's and may stand 7 feet tall.
 * An extinct species reached a height more than 10 feet and had a head the size of a Shetland pony's.
 * There are miniature kangaroos, such as the musk kangaroo, that are no bigger than a jackrabbit.