Biographer Walter Isaacson's latest book tells the story of biochemist Jennifer Doudna. She helped develop a controversial tool that has the power to transform the human race. CRISPR can edit genes to cure diseases but can also be used to create designer babies. Doudna's involvement in pioneering the technology won her the 2020 Nobel Prize in Chemistry. Before CRISPR, Doudna was known as the scientist who cracked the code for what the molecule RNA can do. RNA is well known now as playing a role in the Pfizer and Moderna Covid-19 vaccines. Isaacson's book, The Code Breaker: Jennifer Doudna, Gene Editing, and the Future of the Human Race, was released this month.