The science and inventions that make us who we are . . . literally Did you know the first blood transfusions were between people and lambs? Or that the first prosthetic hand with a hook was created so a French soldier could hold the reins of his horse in battle? Or that scientists recently grew a nose? Invention & Impact , an exciting new series from PYRG-Smithsonian, introduces young readers to experiments, discoveries, and breakthroughs such as...