A handout photo released on March 7, 2017 by Paleoanthropology Group MNCN-CSIC shows the upper jaw of Neanderthal El Sidron 1, found in what is today Spain, with a dental calculus deposit visible on the rear molar (right).Photo: AFP

Stuff between Neanderthal teeth reveals diet of rhino, mushrooms - and suggests they were kissing humans

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A handout photo released on March 7, 2017 by Paleoanthropology Group MNCN-CSIC shows the upper jaw of Neanderthal El Sidron 1, found in what is today Spain, with a dental calculus deposit visible on the rear molar (right).Photo: AFP
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