New NASA Research Shows Giant Asteroids Battered Early Earth

New NASA Research Shows Giant Asteroids Battered Early Earth
Moffet Field CA (NASA) Aug 01, 2014 - New research shows that more than four billion years ago the surface of Earth was heavily reprocessed - or melted, mixed, and buried - as a result of giant asteroid impacts. A new terrestrial bombardment model, calibrated using existing lunar and terrestrial data, sheds light on the role asteroid collisions played in the evolution of the uppermost layers of the early Earth during the geologic eo ... more

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