re: "Melting glaciers (10 to 20 million years ago) likely sculpted Mars gullies."
"Because this new study, funded by NASA and the National Science Foundation, shows that glaciers pre-existed the gullies, it seems likely that melting snow and ice are behind the gully formations."
So, what does this mean for the "new" gullies that were documented by sattelite photographs to have been formed during the last 10-15 years?