Perhaps a flood or strong flow of water. Once the rock is there it hasn´t moved for billions of years, there are no forces strong enough to move it in the very thin atmosphere.
The rover was sent to a crater that was once filled with water.
Perhaps a flood or strong flow of water. Once the rock is there it hasn´t moved for billions of years, there are no forces strong enough to move it in the very thin atmosphere.
The rover was sent to a crater that was once filled with water.