The ESA’s Mars Express spacecraft has imaged the channel of a river that flowed long ago on the Red Planet: Reull Vallis: a river ran through it – ESA
Here’s a 3D view:
The ESA’s Mars Express spacecraft has imaged the channel of a river that flowed long ago on the Red Planet: Reull Vallis: a river ran through it – ESA
Here’s a 3D view: