Valles Marineris, a huge canyon on Mars, shows unmistakable signs that it was shaped by flowing water. (discovermagazine.com)
In Ganges Chasma, a huge canyon, stretches of pristine olivine - rich basalt imply that the surface has been little altered by water. (discovermagazine.com)
There was a time, not long ago, when the so - called digital divide was perceived and illustrated as a huge canyon or a miles - wide river. (edweek.org)