Ludwig Lewisohn

  • Jews in Trouble

    ONE of the most excellent of my Christian friends (the greater number of my older friends are such) could finally hold in no longer. 'Your people…

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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