https://www.newscientist.com/article/2291632-the-deepest-canyons-on-mars-were-rapidly-formed-by-devastating-floods/amp/?__twitter_impression=true&s=09

The demise of Mars as alluded too throughout my work with the exception of the absurd mainstream “Billions of years” nonsense. Mars, once earth-like only a few thousand years ago was systematically torn apart during encounters with Earth and the new born planet Venus!

More here. https://www.dailymail.co.uk/sciencetech/article-10041411/Mars-surface-carved-furious-floods-3-5-billion-years-ago-study-finds.html