Around 466 million years ago, Earth might have had a ring of asteroid debris, according to a recent study. This ring is linked to an increase in impact craters during the Ordovician Period, a time before land animals existed. Researchers, led by Andy Tomkins from Monash University, propose that an asteroid passed close to Earth, was torn apart by its gravity, and formed a ring around the Equator. This ring could explain the clustering of craters around the Equator and may have influenced climate and biodiversity changes. The study was inspired by theories about Mars’ moons forming from a ring.