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A ‘doorway’ on Mars? How we see things in space that aren’t there.

A panorama stitched together from about 100 individual Curiosity images. The ‘door’ is circled, and is tiny and hard to see at this scale. (Image credit: NASA/JPL-Caltech/MSSS)

This article was originally published at The Conversation. (opens in new tab) The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights.

David Rothery (opens in new tab), Professor of Planetary Geosciences, The Open University

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