Earth as seen by the Apollo 11 astronauts floating above the moon
NASA
A mysterious layer of area mud that coated Earth thousands and thousands of years in the past may very well be shrapnel from asteroids that smashed into the moon, in accordance with a brand new evaluation of soil from beneath the ocean ground.
Within the Nineteen Nineties, geologists discovered unusually raised ranges of helium-3 throughout Earth’s crust, relationship again to round 33 million years in the past. This was puzzling as a result of the isotope nearly at all times seems solely in objects from area, because of bombardment by cosmic rays. …