Learn all about scientists who changed history in this engaging and colorful board book perfect for inventors-in-training!Asking why.  Then making a guess. Asking how.  Then proving with tests. Little scientists make great big discoveries. In this follow up to This Little President, This Little Explorer, and This Little Trailblazer now even the youngest readers can learn all about great and empowering scientists in history! Highlighting ten memorable scientists who paved the way, parents and little ones alike will love this discovery primer full of fun, age-appropriate facts and bold illustrations.