Squirrel
Paranormal Maven
Commentator Anton Petrov posted a video of the "door on Mars," screen shot above.
Link:
But I have to say "Sorry, Anton" in response to Anton's attempt to write the doorway off as "pareidolia." (The tendency for people to see things which aren't actually present. Such as faces in clouds.)
That door in the video appears to have a smooth interior wall, looks like concrete, not at all like the exterior sandstone.
- Squirrel