I didn't know the valleys were that old. So old we even have to take the evolution of the sun into account.
Grau Galofre's theory also helps explain how the valleys would have formed 3.8 billion years ago on a planet that is further away from the sun than Earth, during a time when the sun was less intense.
I didn't know the valleys were that old. So old we even have to take the evolution of the sun into account.
In total, the researchers analyzed more than 10,000 Martian valleys, using a novel algorithm to infer their underlying erosion processes. "These results are the first evidence for extensive subglacial erosion driven by channelized meltwater drainage beneath an ancient ice sheet on Mars," says co-author Mark Jellinek, professor in UBC's department of earth, ocean and atmospheric sciences. "The findings demonstrate that only a fraction of valley networks match patterns typical of surface water erosion, which is in marked contrast to the conventional view. [...]"
I didn't know the valleys were that old. So old we even have to take the evolution of the sun into account.
From the article: