Organic molecules are essential for life, and the Philae spacecraft has found some on the surface of the comet it landed on last week.
Comet 67P is more than 500 million miles from Earth. A German-built instrument "sniffed" the atmosphere of the comet and picked up the compounds, the BBC reports. After Philae landed, a hammer struck the comet, and preliminary results sent back suggest there is a layer of dust on the surface with hard water-ice underneath.
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