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In 1924—30 years before Sir Edmund Hillary and Tenzing Norgay’s famed 'first summit'—George Mallory and Andrew Irvine set out to conquer Everest, only to die trying. Mallory’s body has since been found, but nobody's sure whether the two died on the ascent, or if they made the first-ever summit. Irvine’s corpse is still lost and, with him, his camera. Many believe that the answer of who was first likely lies behind its frozen aperture. For now, though, the mystery abides.

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