What the Mars orbital camera has revealed from this long and detailed study of the Red Planet is a dynamic Mars, a planet that can change not on the mind-boggling millions and billions of years, but on the order of years and decades.
To see new gullies and other changes in Mars surface features on a time span of a few years presents us with a more active, dynamic planet than many suspected.
Dramatic discoveries ... about recent gullies, near-surface permafrost and ancient surface water have given us a new Mars in the past few years.