The DNA from outer space

Did life on Earth begin with a meteorite carrying the building blocks of DNA? NASA scientists think it's possible

NASA scientists discovered that meteorites contain components of DNA
(Image credit: NASA's Goddard Space Flight Center/Chris Smith)

While we haven't quite discovered extra-terrestrial life yet, we may be inching closer. Scientists worldwide are excited about NASA's recent announcement that the building blocks of DNA have been discovered on several meteorites — and that these meteorites' DNA components are not the result of any contamination from here on Earth. The discovery adds weight to the theory that life on our planet may have been started by meteorites, comets, or other objects that fell to Earth. Here, four key questions:

What did the NASA team find?

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