“A permanent base on Mars would have a number of advantages beyond being a bonanza for planetary science and geology. If, as some evidence suggests, exotic micro-organisms have arisen independently of terrestrial life, studying them could revolutionise biology, medicine and biotechnology.”

“There are things I am more interested in than the clone thing. How are they trying to find their place in the world and make sense of their lives? To what extent can they transcend their fate? As time starts to run out, what are the things that really matter?”