The canyons and caves of Mars. Bob Zimmerman, BehindtheBlack.com

Mar 21, 01:36 AM

Photo:Opportunity's panoramic camera (Pancam) took the component images for this view from a position outside Endeavor Crater during the span of June 7 to June 19, 2017. Toward the right side of this scene is a broad notch in the crest of the western rim of crater. Image credit: NASA/JPL-Caltech/Cornell/Arizona State Univ.

The canyons and caves of Mars. Bob Zimmerman, BehindtheBlack.com

https://behindtheblack.com/behind-the-black/points-of-information/mars-likely-has-many-large-and-extensive-cave-systems/