Bombardirana of comets, asteroids and their numerous debris lunar surface is subjected to a sort of plastic surgery every 81,000 years, according to a study cited by AFP.
They reveal that the new craters formed due to these frequent clashes, more than previously thought.
As studied pictures of NASA scientists also found thousands of subtle changes in the surface of the natural satellite of Earth.
“Scientists interpret them as signs of secondary collisions that overturned centimeter layer of dust on the lunar surface, without forming craters,” said the expert Andrew Michinsan.
According to scientists, the lunar regolith had overturned completely in about 81,000 years, ie 100 times faster than expected.
The moon is still marked by craters because its extremely thin atmosphere can not prevent small meteorites reach the surface. The Earth is protected by a thick atmosphere that manages to stop numerous debris.