Summary:
- According to new research, Earth may have had a ring system around 466 million years ago during the Ordovician period.
- The proposed ring system would have been made up of dust and debris and may have contributed to a global cooling event that occurred during that time period.
- The evidence for this ring system comes from analyzing the geochemical signatures in ancient seafloor sediments, which suggest the presence of a large amount of extraterrestrial material in the atmosphere.