Science is usually a force for good in the world, but scientists can sometimes twist a noble pursuit into something sinister. Ranging across two millennia, the author of The Disappearing Spoon discusses Thomas Edison's support of the electric chair, the spies who infiltrated the Manhattan Project, and the icepick lobotomies of the 1950s. Sam Kean draws direct lines from the medical abuses of Tuskegee and Nazi Germany to current vaccine hesitancy, and looks to the future, when AI and genetic engineering could unleash whole new ways to do one another wrong.