Splatters of molten rock signal period of intense asteroid impacts on Earth
Wednesday, April 25, 2012 - 16:31
in Astronomy & Space
New research reveals that the Archean era -- a formative time for early life from 3.8 billion years ago to 2.5 billion years ago -- experienced far more major asteroid impacts than had been previously thought, with a few impacts perhaps even rivaling those that produced the largest craters on the Moon.