universetoday.com
Not Pits, Tubes
Remember those amazing images of open pits on Mars? NASA’s Mars Reconnaissance Orbiter has come back around and taken another image of one of the features, and this time it spotted a wall on one side. This wall indicates that these “pits” are probably tunnels, similar to surface features on Earth called “pit craters”. The … Continue reading "Not Pits, Tubes"
Fraser Cain