What significant evidence is there for the idea that large quantities of water once flowed on the planet Mars?

Question

Quizplus · Accepted Answer

Deep, winding canyons and flood plains on Mars suggest that large quantities of water flowed on the planet in the past. These features were likely formed by massive floods that swept across the surface of the planet, carving out the canyons and leaving behind the flood plains. Other evidence, such as the presence of minerals that form in the presence of liquid water, also supports the idea of a watery past on Mars. However, options A, B, and C are not entirely accurate or sufficient to support this idea.

What Significant Evidence Is There for the Idea That Large