Gravity is the weakest force in the everyday world yet it is the strongest force in the universe. It was the first force to be recognised and described yet it is the least understood. It is a 'force' that keeps your feet on the ground yet no such force actually exists.Gravity, to steal the words of Winston Churchill, is 'a riddle, wrapped in a mystery, inside an enigma'. And penetrating that enigma promises to answer the biggest questions in science: what is space? What is time? What is the universe? And where did it all come from?Award-winning writer Marcus Chown takes us on an unforgettable journey from the recognition of the 'force' of gravity in 1666 to the discovery of gravitational waves in 2015. And, as we stand on the brink of a seismic revolution in our worldview, he brings us up to speed on the greatest challenge ever to confront physics.Author BiographyMarcus Chown is an award-winning writer and broadcaster. Formerly a radio astronomer at the California Institute of Technology in Pasadena, he is cosmology consultant for NEW SCIENTIST. His books include WHAT A WONDERFUL WORLD, QUANTUM THEORY CANNOT HURT YOU and WE NEED TO TALK ABOUT KELVIN, which was shortlisted for the 2010 Royal Society Book Prize. He is also the author of the app SOLAR SYSTEM FOR iPAD, which won THE BOOKSELLER Digital Innovation of the Year award. Marcus was a regular guest on the BBC4 comedy-science show, IT'S ONLY A THEORY, and Channel 4's SUNDAY BRUNCH. He has spoken at a variety of events, including the Cheltenham Literary Festival, Sydney Writers Festival, the National Theatre and Wilderness Festival. And he has also performed stand-up comedy at a variety of venues from an upturned

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