This Cool Video devotes nearly four minutes in explaining why it is dark at night. It is more than simply the rotation of the earth and the light we do see at night is more than starlight, but the echo of the Big Bang. I stumbled on it on Maria Papova at Brain Pickings, which she found on MinutePhysics.
Cool Video: Why is it Dark at Night?--More Complicated than You Think
![Cool Video: Why is it Dark at Night?--More Complicated than You Think]()
Reviewed by Marc Chandler
on
November 10, 2013
Rating:
