[gb]

https://www.livescience.com/mars-deepest-canyon-in-solar-system.html?utm_term=WildWeird&emci=d55c496b-9950-eb11-a607-00155d43c992&emdi=8ef6d826-2751-eb11-a607-00155d43c992&ceid=2028176

[Cyclopath]

I saw this this morning, it's fascinating. To think of an ancient Mars with rivers ... it's the stuff science fiction is born from. I wonder how they know, or can even be sure enough to put that in a headline. We still don't know that much about the outer solar system. We aren't even sure how many planets there are.