Persephone, the robot guide, leads visitors in a Greek cave
By COSTAS KANTOURIS Associated Press ALISTRATI, Greece (AP) — Persephone is not your ordinary robot. Billed as the world’s first robot used as a tour guide inside a cave, Persephone has been welcoming visitors to the Alistrati cave in northern Greece since mid-July. The multilingual robot covers the first 150 meters (500 feet) of the
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