When Jennifer Doudna was in sixth grade, she came home one day to find that her dad had left a book titled The Double Helix on her bed. She put it aside, thinking it was one of those detective tales she loved.rnOn a rainy Saturday, she picked up the book. As she sped through the pages, she became fascinated by the drama, which encouraged her to explore nature's wonders. Even though her high school teacher told her that girls didn't become scientists, she decided she would.rnShe worked with a biologist, Charpentier, to turn a curiosity about nature into an inven-tion—an easy-to-use tool that can edit DNA. Known as CRISPR, the tool will transform the human race. James Watson, the author of The Double Helix, later told her it was the most im-portant biological advance since he and Francis Crick discovered the structure of DNA.