Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house. – Henri Poincaré, Science and Hypothesis, 1905
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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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