Dr Paul Parsons has been a science writer and journalist for over twenty years. He was Editor of BBC Sky at Night magazine and has also written for New Scientist, the Guardian, Daily Telegraph, Men's Health, National Geographic and many others. He is the author of several books including The Science of Doctor Who, The Periodic Table, 3-Minute Stephen Hawking and 50 Science Ideas You Really Need to Know. He is also a fellow of the Royal Statistical Society and a consultant to Guinness World Records.