ScienceDouble Impact: Two Meteorites Hit Sweden More Than 400 Million Years Ago Researchers from the University of Gothenburg in Sweden found two enormous craters in the county of Jämtland that were likely formed by meteorites that hit the Earth around 458 million years ago.by Ted Ranosa
ScienceChelyabinsk asteroid was result of massive collision of two space rocks, scientists sayby James Maynard