Kingfisher Books Limited

Moving AboutSome animals move only once in their lives. Baby oysters and sponges, for example, swim until they find a good place to stay. Then they fasten themselves on to rocks and never move again. But most creatures travel to find food, warmth or a mate. They move to escape enemies, heat, frost...

II kiAn "¦L ¦ < t i .-.ii.t t. !1 '¦.I il How fast can aeroplanes fly? Faster and faster planes have been built since the first powered flights took place early this century. Today, the record for the world's fastest jet plane is still held by the USA's Lockheed SR-71A. In 1976, it...