Braided fluvial channels (inset) emerge from the edge of glacial deposits roughly 210 million years old on the martian volcano Arsia Mons, nearly twice as high as Mount Everest. (sciencedaily.com)
The Dry Valleys» most striking similarity to the Red Planet is in glacial deposits laid down by ice so cold that meltwater never reworks the surface features. (discovermagazine.com)
The tools were found beneath glacial deposits laid down during a period 450,000 years ago when the region was blanketed in ice, so they must be older than this. (newscientist.com)