BEIJING, Jan. 28 (Xinhuanet) -- Despite increased calls to step up efforts in finding extraterrestrial life by sending signals into space, some scientists believe such a strategy may prove dangerous. In Britain Dr Marek Kukula, public astronomer at the Royal Observatory in Greenwich, said, "Part of me is with the enthusiasts and I would like us to try to make proactive contact with a wiser, more peaceful civilisation." But he is concerned at the risks. "We might like to assume that if there is intelligent life out there it is wise and benevolent," he said, "But of course we have no evidence for this. Given that the consequences of contact...