Famous asteroid Ryugu may have been bombarded by a swarm of tiny space rocks 1,000 years ago

In 2020, Japan's Hayabusa2 spacecraft brought samples of an asteroid named Ryugu to Earth — and now, scientists examining those samples found that the object bears the scars of a recent encounter with tiny space rocks. The reason the research team believes Ryugu was bombarded by micrometeorites is due to a fine layer of sodium, just 10 nanometers thick, on the surface of the asteroid 's fragments. …