検索キーワード： 著者 "Tracy Vonder Brink" すべてのカテゴリー

Injured by a cannonball, James Edward Hanger was the first amputee of the Civil War. Determined to find a better solution than a peg leg, he worked to develop his own artificial limb company. He even continued working past retirement, providing Hanger Limbs for victims of World War I.

Travel through Rumpke’s recycling center to find a plastic jug? Trash that can be recycled takes a ride on the conveyor belt to become something new! Try to find the milk jug on the conveyor belt! Trash at the factory goes through many machines to make sure it can be recycled. Can you guess what the milk jug will help make once it leaves the factory? What other types of trash go on the conveyor belt?

Take a ride on a rover with NASA as they explore the planet Mars. Learn how NASA explores Mars for evidence of life especially the existence of water. Scientists believe that life depends on water. Is it possible that Mars had life and why is it so different from Earth? Discover the tools, equipment and methods scientists use to uncover rock, water, and fossils to test as evidence of life.