Sheldon M. Stern

  • What JFK Really Said

    The author checked the Cuban-missile-crisis transcript in The Kennedy Tapes against the recorded words. He discovered "errors that undermine its reliability for historians, teachers, and general readers

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

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