Gullies in the Mist
Gullies in the Mist Another gem discovered in the latest release of images from the Mars Reconnaissance Orbiter. At 3:49 pm local time on Halloween 2019, the clouds parted just enough for the HiRISE camera to glimpse these gullies in the wall of an unnamed crater in the southern highlands. NASA/JPL/University of Arizona

Gullies like these fascinate Mars explorers because some of them are thought to seep with liquid water from underground aquifers. 

"We're changing the world. Are you in?"
- CEO Bill Nye

Sign up for email updates