Monsters from space: Would we want to know? Should we be told if a monster rock is heading our way? Researchers wrestled with this question on Friday at the annual meeting of the American Association for the Advancement of Science (AAAS) in Denver. Some suggested there was no point worrying the global population about its imminent demise. "If there is absolutely nothing you can do about it - you can't intercept it, you can't move people out of the way - then it makes no sense to incur social costs from whatever panic or overreaction there will be," argued Geoffrey...