The archaeological excavations at Dmanisi, in the Republic of Georgia, are a glorious exception to the rule that if you are in a hole, you should stop digging. What began as the excavation of a medieval town has turned into a pivotal site for our understanding of human evolution. So far, palaeoarchaeologists working there have unearthed five ancestral human skulls and other remains: the individuals they represent are now the central characters in a story whose plot is poised to undergo a major twist.
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