We are told that modern science was invented in Europe, the product of great minds like Nicolaus Copernicus, Isaac Newton, Charles Darwin and Albert Einstein. But this is wrong. Science is not, and has never been, a uniquely European endeavour. Copernicus relied on mathematical techniques borrowed from Arabic and Persian texts. When Newton set out the laws of motion, he relied on astronomical observations made in Asia and Africa. When Darwin was writing On the Origin of Species, he consulted a sixteenth-century Chinese encyclopaedia. And when Einstein was studying quantum mechanics, he was inspired by the Bengali physicist, Satyendra Nath Bose. 'Horizons' pushes beyond Europe, exploring the ways in which scientists from Africa, America, Asia and the Pacific fit into the history of science, and arguing that it is best understood as a story of global cultural exchange.