[T]he debris from that 466-million-year-old breakup continued to fall. And fall. And fall. Even now, they make up the largest group of meteorites that land on Earth.
“That collision cascade” — the series of smaller smashes and crashes that followed the initial breakup — “had consequences that are still felt today,” said Philipp Heck, a cosmochemist at the University of Chicago and curator of meteorites for the Field Museum.
Thursday, January 26, 2017
"A 466-million-year-old space collision is still raining shrapnel on Earth":