With the recent landing of the Mars rover Curiosity, it seems safe to assume that the idea of being curious is alive and well in modern science—that it’s not merely encouraged but is seen as an essential component of the scientific mission. Yet there was a time when curiosity was condemned. Neither Pandora nor Eve could resist the dangerous allure of unanswered questions, and all knowledge wasn’t equal—for millennia it was believed that there were some things we should not try to know. In the late sixteenth century this attitude began to change dramatically, and in Curiosity: How Science Became Interested in Everything, Philip Ball investigates how curiosity first became sanctioned—when it changed from a vice to a virtue and how it became permissible to ask any and every question about the world.