Best Video/Proč je v noci tma? (Why is it Dark at Night?)

{{Application:Wikilook Blog/Article
 * blog=Best Video
 * module=Article
 * author=Gaijin
 * publishingtimestamp=2012/10/16 21:00
 * title=Proč je v noci tma? (Why is it Dark at Night?)
 * categories=Věda
 * leading=Proč je v noci tma?
 * text={{ Widget YouTube Advanced | id = gxJ4M7tyLRE | width = 560 | height = 315 | language = cs_CZ }}

Reference
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 * comments=Collaboration, Disqus
 * channel=Riverlook
 * uuid_select=Yes
 * uuid=32ac1c89-a66c-4c4a-81c6-42fdaf3952b7