On 17 July 1717, King George I sailed the Thames whilst fifty musicians performed Handel’s newly commissioned Water Music on a floating barge. The public turned out in hundreds of boats to listen, uninvited. That same date in 1048, Poppo of Brixen was elected Pope Damasus II and lasted just twenty-three days before dying, barely enough time to learn where anything was. In 1850, astronomer John Adams Whipple captured the first photograph of a star other than the Sun: Vega, whose light had travelled twenty-five years to reach a glass plate in Massachusetts. And in 2008, Argentine Vice-President Julio Cobos cast the deciding vote against his own government’s agricultural export tax, telling the Senate his conscience compelled him to do so. The chamber, by all accounts, went berserk. Clara Vale explores outdoor concerts that changed music, papal elections that ended before they started, the birth of photographic astronomy, and political decisions that make history whether you planned to or not.