Which of the follow is evidence for Mars once having had liquid water on its surface?
A) Mapping satellites have detected dry riverbeds.
B) Rovers have detected minerals that must have formed in the presence of liquid water.
C) Mapping satellites have detected outflow channels coming from impact craters.
D) large canyons
E) all of these

Question

Quizplus · Accepted Answer

All the options listed are evidence that suggests Mars once had liquid water on its surface. Dry riverbeds, minerals formed in water, outflow channels, and large canyons all indicate past water activity.

Which of the Follow Is Evidence for Mars Once Having