From running and climbing, to swimming and diving, animals are always on the move. Learn how some are built for speed, while others move in unusual ways.

"Through carefully leveled text and powerful images, explores screws a useful simple machine"--

"Through carefully leveled text and powerful images, explores pulleys a useful simple machine"--

"Describes snowplows, including their main parts and how they keep roads safe to drive on"--

Like humans, animals have senses and often theirs are sharper. Learn how they use their senses to stay safe, hunt food, and find their way around.

Discusses the progress women have made in astronomy.

"Animals that live in the African savannah, what they eat, and where they live"--

"This brand-new series highlights some of the major contributions women have made in the world of science. From studying stars and discovering comets to flying into space as pioneering astronauts, women have been central to learning about space. Female astronomers gave us our first understanding of how large the universe really is and how much matter it contains. They were key to designing humans' first rocket-powered flights into space. And as soon...