Meet Lewis Dartnell:

Prof. Lewis Dartnell (www.lewisdartnell.com) is an astrobiology researcher based at the University of Westminster, studying how microbial life, and signs of its existence, might persist on the surface of Mars. Alongside his research he writes regular science articles in newspapers and magazines, and has appeared in TV shows such as BBC Horizon, Wonders of the Universe, and documentaries on National Geographic, Discovery and History channels. ‘The Knowledge: How to Rebuild our World from Scratch’ (www.the-knowledge.org) is his third book, and is a Sunday Times Book of the Year.