If an elderly but distinguished scientist says that something is possible, he is almost certainly right but if he says that it is impossible, he is very probably wrong. – Arthur C. Clarke
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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. – Paul Davies
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