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The roughly 8,000-year-old "hands" painted on a rock wall in the Sahara Desert aren't human at all, as researchers originally thought, but are actually stencils of the "hands" or forefeet, of the desert monitor lizard, a new study finds.

These tiny lizard hands are intermingled with paintings of human adult hands, which ancient rock artists stenciled around using red, yellow, orange and brown pigments, the researchers said.