Nasa's Curiosity rover has discovered a mysterious metal object emerging from rock on the surface of Mars.
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These images were captured by a camera on Curiosity, and reveal the bizarre finger-like structure protruding from the Martian surface and casting a shadow on to the rock below.
Science buffs have suggested the small, shiny-looking object, which makes for an incongruous sight amid the rocks, could be composed of material less susceptible to erosion than its surroundings.
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