Vsauce

The speed of light zips along at 299,792,458 m/s. But what about the speed of dark? Dark is really just the absence of photons, but dark shadows can appear to have some pretty amazing properties.

Check out this Vsauce video that explores the speed of light, shadows, stages of twilight, the rate of collecting knowledge versus realizing the depths of our ignorance, and more:

 

 

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