Guardian: It's been a week of doom as far as the public face of science is concerned. On Tuesday we had Sir David Attenborough's depressing prognostications that the future is going to be worse for our children and their children (especially if we insist on producing more children in the first place). Now the comments by the astronomer royal, Martin Rees, take the apocalyptic tone to a new level, one which resonates with his medieval title. With a Nostradamus-like gloom, he intimates it may be too late to...