Leah Caldwell

Leah Caldwell is a freelance journalist based out of Washington, D.C.

Leah Caldwell: Magazine articles

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Video

Where Time Comes From

The clocks that coordinate your cellphone, GPS, and more

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Computer Vision Syndrome and You

Save your eyes. Take breaks.

Video

What Happens in 60 Seconds

Quantifying human activity around the world

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