Asteroid Attack 4 Billion Years Ago May Have Accelerated Life on Earth

(PhysOrg.com) -- The bombardment of Earth nearly 4 billion years ago by asteroids as large as Kansas would not have had the firepower to extinguish potential early life on the planet and may even have given it a boost, says a new University of Colorado at Boulder study.

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<p><a href="http://www.physorg.com/news162045388.html">Asteroid Attack 4 Billion Years Ago May Have Accelerated Life on Earth </a></p> <p>(PhysOrg.com) -- The bombardment of Earth nearly 4 billion years ago by asteroids as large as Kansas would not have had the firepower to extinguish potential early life on the planet and may even have given it a boost, says a new University of Colorado at Boulder study.</p>