Strange 'Doorway' Was Spotted on Mars in NASA Photos and Internet Has Theories - News18

A discussion erupted regarding the origins of this 'doorway' on the red planet. But the explanation that stuck with logic the longest was that it was just a rock formation due to natural factors.

The Mars Curiosity rover sent by the National Aeronautics and Space Administration (NASA) acts as eyes on our neighbouring red planet, and recently this eye caught something very unusual. Discourses … [+1633 chars]

full article...