“I consider Bush's decision to call for a war against terrorism a serious mistake. He is elevating these criminals to the status of war enemies, and one cannot lead a war against a network if the term war is to retain any definite meaning.”

“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.”