WASHINGTON, DC — Each June in Huinchiri, Peru, four Quechua communities on two sides of a gorge join together to build a bridge out of grass, creating a form of ancient infrastructure that dates back ...
[youtube =http://www.youtube.com/watch?v=CCDIuZUfETc&w=537&h-302] The dexterity and speed with which the flying drones carry out their tasks is so impressive we can ...
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