Dark Caverns Discovered on Mars - Universe Today
When I first saw this image, I thought it was some kind of joke, or Photoshop trick. But nope, this is real. NASA’s Mars Reconnaissance orbiter has returned images of strange cavern entrances on Mars. See that dark spot in the middle of the picture? It seems to be a hole, in an otherwise smooth … Continue reading "Dark Caverns Discovered on Mars"
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