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Persephone, the robot guide, leads visitors in a Greek cave
The robot was built by the National Technology and Research Foundation and cost 118,000 euros ($139,000)
The magical Balos Beach in Crete (video)
Crystal clear water, the lagoon, rocky steep mountains, a beach bar and a pirate island are located at the same region
Dedicated commercial human in-space operations are coming sooner than you may realize
"One-way ticket to Mars, please"