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Asteroid Impacts May Have Formed Life’s Building Blocks

A high-powered laser in the Czech Republic has now produces provoking evidence that the hellish circumstances produced when an asteroid or comet slams into Earth could have shaped some key building blocks of life on Earth. In a lab experiment proposed to duplicate the high temperatures and pressures of such an impact, scientists used the laser to make adenine, guanine, cytosine, and uracil, the four organic compounds in RNA at the same time, which many consider to have been the first molecule to encode genetic info.