Photographer Nour El Massry captures ethereal images of Egyptian landscapes, interiors and architecture in one of the world's largest megacities.

A startup called PimEyes allows anyone to identify a stranger within seconds with just a photo of the person's face. The technology has alarmed privacy advocates worldwide.

This year's best pictures include two friends sunbathing on giant shards of ice in Kazakhstan, workers at a red chili factory in Bangladesh and a white mangrove forest in Vietnam.