Trace the quest to solve the scientific riddle of how human traits are passed down from one generation to the next in this new book from National Geographic.

The story begins in 1856, when the scientist and monk Gregor Mendel begins experiments on pea plants, not knowing that he was about to unlock the first secrets of genetics and change our understanding of heredity forever.

"Double Helix" follows the path to understanding the mysteries of DNA--a twisting quest that will draw young readers into the stories of scientists like Crick and Watson and reveal the discovery's strange connection to the atomic bomb. Author Glen Phelan's accessible text will help readers understand how complex genetic codes distinguish every single individual on Earth. The book also explores the vast range of applications for this landmark biological discovery in areas such as medicine, law, and historical research.