Mun Keat Looi is in charge of web content, social media and digital strategy for one of the world's biggest biomedical research charities, The Wellcome Trust. A former News Editor at SciDev.Net, he also writes for the Guardian and has worked for Thomson Reuters and the Nuffield Council on Bioethics. Hayley Birch is a science writer and editor with a sideline in quirky science projects. A former Editor at the Journal of Unlikely Sciences, she has written for New Scientist, Nature, The Telegraph and BBC Focus magazine. Colin Stuart is a physics and space geek. A presenter at the Royal Observatory Greenwich, he has also written for the Guardian, European Space Agency and Physics World, and is the brains behind the most watched science video on YouTube.

Introduction; 1 - What is the Universe made of; 2 - How did life begin; 3 - Are we alone in the Universe; 4 - What makes us human; 5 - What is consciousness; 6 - Why do we dream; 7 - Why is there stuff; 8 - Are there other universes; 9 - Where do we put all the carbon; 10 - How do we get more energy from the Sun; 11 - What's so weird about Prime Numbers; 12 - Can computers keep getting faster; 13 - When can I have a robot butler; 14 - How do we beat bacteria; 15 - Will we ever cure cancer; 16 - What's at the bottom of the ocean; 17 - What's at the bottom of a black hole; 18 - Can we live forever; 19 - How do we solve the population problem; 20 - Is time travel possible?