The remarkable way 3D printers are saving lives in refugee camps

Refugee camps are usually seen as scenes of crisis. But a team of innovators wants to change that.

Ahmad's world went dark at age 22 when he was shot across the eyes during the Syrian civil war.

But two years later, a Syrian refugee named Asem came across a startup called Refugee Open Ware, where he learned to build Ahmad a customized echolocation device that fit over his hand.

The device uses vibrations to indicate how close objects are in his environment, and it's helping Ahmad walk on his own again.

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4 rules for birdwatching that serve as real talk about race

Drew Lanham knows a lot about birds. That makes him an expert on race, too.

When I first met Drew, he'd just given a keynote address about birds to a group of environmental educators.

Drew Lanham is a well-respected ornithologist, which means that he knows a lot about birds. During his keynote speech, he told stories, spun poetry, and did birdcalls — I've never seen a science talk filled with so much heart.

When he finished his speech, 500 people leapt to their feet with thundering applause.

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