Curiosity has killed many an explorer, and Nicola Mari feared he was to be the next.

Driving around Cyprus’s remotest mountains, Mari had relied on his cell phone for directions. But as the light of the day faded, so did his phone battery – and he found himself stuck in the middle of nowhere with little idea of the way back to his lodgings. “I’d travelled for more than 50km (31 miles) without seeing another vehicle,” he says.

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