There used to be a ring of its own around the Earth, probably

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The study by Prof. Andy Tomkins (Monash University) argues that about 466 million years ago our planet was surrounded by a ring of stone debris, and this could be the explanation for the anomalously high frequency of space objects falling to Earth recorded in the geological record.

Unlike the famous Chicxulub impact that led to the extinction of the dinosaurs, there was a larger event at the beginning of the Ordovician that left many craters.