David M. Barreda and David Wertime

David Barreda is the Director of Visuals for ChinaFile. David Wertime is the co-founder and co-editor of Tea Leaf Nation.

David M. Barreda and David Wertime: Blog articles

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Video

Where Time Comes From

The clocks that coordinate your cellphone, GPS, and more

Video

Computer Vision Syndrome and You

Save your eyes. Take breaks.

Video

What Happens in 60 Seconds

Quantifying human activity around the world

Writers

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