Now it seems that, all along, that small anomaly – the 2-degree tilt of Deimos’ orbit with respect to Mars’ equator – held a clue to something very interesting about the red planet’s past … that Mars used to have rings! The researchers published the new peer-reviewed paper in Astrophysical Journal Letters on June 1, 2020. The research was also presented at the 236th Meeting of the American Astronomical Society (AAS 236), held virtually this week (June 1-3, 2020) due to COVID-19. https://earthsky.org/space/did-ancient-mars-have-rings-deimos With Mars having rings at one time I think a new discussion regarding how the Moon was formed needs explored via Lunar landings and colonization. We have to determine whether fragments of Mars exist deep inside of the surface of the Moon. Another new discussion would involve the extinction of the dinosaurs. Could a rogue asteroid from the rings around Mars impacted Earth after Mars lost the ability to maintain the rings themselves?