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Message: <blockquote data-quote="Stimulus mind" data-source="post: 27729387" data-attributes="member: 577135">A deep crack or fissure is visible inside the "door", indicating a fracture in the rock - something that happens on both Mars and Earth and could have taken place any time in the past few hundred million years. "The crack is a fracture and they are abundant on Mars and Earth - no need for marsquakes to produce them," said Professor Sanjeev Gupta, who has worked on the Curiosity mission with NASA."There is nothing at all strange in the image - these are just normal geological processes." Perspective also comes into play - NASA says the fissure only appears to be a full-sized door because the image is extremely zoomed in.news.sky.com</blockquote>

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