Impact craters found around the Earth that were made around the same time could be linked to debris falling from a ring, a new study suggests.

From Grace Earth may have had its own ring system that formed around 466 million years ago, lasting for tens of millions of years. As detailed in a new study published in the journal Earth and Planetary Science Letters,

Led by Monash University’s School of Earth, Atmosphere and Environment, the study was published Tuesday in the journal Earth and Planetary Science Letters . The scientists behind the study believe the rings may have been created by intense meteoric bombardment of Earth,