Prof. Lewis Dartnell is a research scientist, presenter and author based in London. His research is in the field of astrobiology and the search for microbial life on Mars and he now holds the Professorship in Science Communication at the University of Westminster. He has also held a STFC Science in Society Fellowship. He is very active in delivering live events at schools and science festivals, works as a scientific consultant for the media, and has appeared in numerous TV documentaries and radio shows. He has won several awards for his science writing and outreach work and regularly writes for newspapers and magazines. He has published three books, most recently, The Knowledge.