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Dr Tim Gregory is a nuclear chemist at the United Kingdom National Nuclear Laboratory at Sellafield, public speaker, broadcaster and author of Meteorite: How Stones from Outer Space Made our World. In 2017, he was a finalist in BBC2's Astronauts: Do You Have What it Takes and has also presented on BBC's The Sky at Night and Channel 4’s Steph’s Packed Lunch. He has a PhD from the University of Bristol and lives in the North of England. His website is www.tim-gregory.co.uk. --This text refers to an out of print or unavailable edition of this title.