Ryan Jacobson 
Marvelous Medical Inventions [PDF ebook] 

Did you know that a scientist discovered X-rays by accident? Or that people have been taking pain medicine for more than 5, 000 years? Get ready to learn the strange stories behind inventions you use every day. From the Roman warrior with a famous false hand to the Boy Scouts who made Band-Aids a big deal, you’ll find out how we got the medical wonders that help us heal faster and feel better.