Most significant scientific discoveries of significance are made after years of painstaking research. But sometimes, a scientist is in the right place at the right time. One night, just days before Halloween, on a dig site in the Sahara Desert, National Geographic explorer and paleontologist Paul Sereno was showing a research assistant where they planned to work when he saw a human foot sticking out of the ground. Sereno tells Boyd that they happened into a 7,000 year old graveyard that lay on top of a dinosaur fossil bed where they located hundreds of human remains.
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