- This Ice Cliff is One of the Few Places With Exposed Water ice in the Mid-Latitudes on Mars. It's Probably Tens of Millions of Years old https://www.universetoday.com/157316/this-ice-cliff-is-one-of-the-few-places-with-exposed-water-ice-in-the-mid-latitudes-on-mars-its-probably-tens-of-millions-of-years-old/ 127 comments space