i is believed that water once flowed across mars surface and now the water is stored in the form of ice!
There is a lot of visible evidence on Mars revealed by the various Mars landers, that water - a lot of water - flowed at one time on the planet.
The river flowed to the sea.The lava flowed across the road. Electricity flowed through the wire.
canyons and sedimentary deposits
It has long channels that may have been carved by flowing water.
See related news article below .
Venus and Mercury also have solid surfaces.
they both have uninhabited surfaces
Mercury,Venus , Earth, and Mars all have rocky surfaces.
silt is just little pieces of rock that the water has flowed across
For one, we know there are polar ice caps on mars that consist of ice. Second, there are gorges that show where water once flowed.
Mercury, Venus, Earth, and Mars are.
It has basalt and many others.