Why is it Dark at Night?

Have you ever wondered why you look up and see a dark sky at night?
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Music by Nathaniel Schroeder

Thanks to Nima Doroud and Niayesh Afshordi for contributions and to Perimeter Institute for support.
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• Category

  Science & Technology

[n00b4liciou5]

We don't talk much anymore...

[TheEletricgamer]

Are you related to slenderman?

[Mohammed Kallsong]

There should be a nobel price for those who explain physic really really insanly good!

[Brian Theis]

I don't know why this causes any religious debate. The Catholic Church, who put the bible together, even says that you don't need to take that beginning part of Genesis literally word for word.

[TechWurst]

Wow, there are even German subtitles! Impressing

[GreenEyedGamer]

We don't know yet. Simple as that.

[Idontcare9876543210]

Thank you very much, that helped alot.

[Idontcare9876543210]

This is about science please leave your mythology at the door.

[Sam Coulter]

its also dark because God created day and night in the Bible. I'm glad that's something that we can all agree is beyond debate.

[Cristian Aguilera]

But, how did that small Universe formed?