18. A perfect pyramid
It looks like something straight from the Libyan Desert, but this isn’t one of the pyramids of Giza. No, this image was captured by NASA’s Curiosity rover, with the “pyramid” being roughly as big as a car. Paranormal investigators say it’s proof of alien life; scientists say it’s simply a quirky rock formation.
17. A huge human face
This large Martian rock in the planet’s Cydonia region looks like a person’s face – there’s just no denying it. It was captured during the Viking 1 mission way back in 1976, but NASA scientists were quick to explain that, unfortunately, the “face” was merely a light-and-shadows induced mirage.
16. A thigh bone
There’s no getting around this one: it’s obviously a thigh bone, right? Well, when it was captured by the Curiosity rover in 2014, NASA swiftly pointed out that, actually, this was the image of a rock that had been eroded by water. That’s still quite exciting, as it’s a sign of life; less exciting, though, is the fact that it could equally well have been shaped by wind.