Asteroid and comet impacts led to primitive life

Australian National University scientists have observed a link between asteroid and comet bombardment of the Earth and the emergence of primitive bacterial life forms in the ancient oceans billions of years ago.

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<p><a href="http://www.physorg.com/news64678130.html">Asteroid and comet impacts led to primitive life</a></p> <p>Australian National University scientists have observed a link between asteroid and comet bombardment of the Earth and the emergence of primitive bacterial life forms in the ancient oceans billions of years ago.</p>