This is amazing because they're thinking is that Mars isn't a dead planet after all, but in fact has a more active climate than Earth:
Glaciers Reveal Martian Climate Has Been Recently Active
"The prevailing thinking is that Mars is a planet whose active climate has been confined to the distant past. About 3.5 billion years ago, the Red Planet had extensive flowing water and then fell quiet - deadly quiet. It didn't seem the climate had changed much since.
Now scientists think Mars' climate has been much more dynamic than previously believed. After examining stunning high-resolution images taken last year by the Mars Reconnaissance Orbiter, the researchers have documented for the first time that ice packs at least 1 kilometer (0.6 miles) thick and perhaps 2.5 kilometers (1.6 miles) thick existed along Mars' mid-latitude belt as recently as 100 million years ago.
In addition, the team believes other images tell them that glaciers flowed in localized areas in the last 10 to 100 million years - akin to the day before yesterday in Mars' geological timeline. This evidence of recent activity means the Martian climate may change again and could bolster speculation about whether the Red Planet can, or did, support life."
Found via dailygalaxy.com.