To most people, horoscopes and astrology are tosh. However, they were once considered cutting-edge science. So says Alexander Boxer, a data scientist with a doctorate in physics from MIT. He is not the sort of person you usually find dabbling in star signs. Since Babylonian times we have tried to predict the future and make sense of our fate using astrology. Boxer shows why this heritage is still worth exploring, and demonstrates that the study of the stars can connect practically any subject — maths, physics, philosophy — with another. Not only that, but “astrology was the ancient world’s most ambitious applied mathematics problem, a grand data-analysis enterprise sustained for centuries by some of history’s most brilliant minds, from Ptolemy to al-Kindi to Johannes Kepler”,