Nancy Pelosi

  • Youth

    When the Founding Fathers gave birth to our great democracy, they had confidence that they were part of revolutionary change in the world, and they…

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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