How Good Is the Polio Vaccine?

Ever since the dramatic proclamation of the Salk vaccine, Americans have been asking, What will this do for my child? Can I trust it? These are the questions which Dr. Rustein sets out to answer.


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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.

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What Happens in 60 Seconds

Quantifying human activity around the world

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