Earth as seen by the Apollo 11 astronauts floating above the moon
NASA
A mysterious layer of house mud that coated Earth hundreds of thousands of years in the past may very well be shrapnel from asteroids that smashed into the moon, based on a brand new evaluation of soil from beneath the ocean ground.
In the Nineteen Nineties, geologists discovered unusually raised ranges of helium-3 throughout Earth’s crust, courting again to round 33 million years in the past. This was puzzling as a result of the isotope nearly all the time seems solely in objects from house, on account of bombardment by cosmic rays. …
Source: www.newscientist.com