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Concerns raised after Australian geneticists inserted an extra gene into the mousepox virus and accidentally created a virus that destroys every mouse it infects. Grains of zircon discoved to be 4.4 billion years old offer clues to early years of the Earth. Evidence for "event horizon" or point of no return of matter being pulled towards a black hole. China launches Shenzhou 2 spacecraft, the next step in its goal of manned space flight. What happens when face recogntion lets you down.