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thecrashcourse:

Humans and Energy: Crash Course World History 207

In which Stan Muller subs for John Green and teaches you about energy and humanity. Today we discuss the ideas put forth by Alfred Crosby in his book, Children of the Sun. Historically, almost all of the energy that humans use has been directly or indirectly generated by the sun, whether that be food energy from plants, wind energy, direct solar energy, or fossil fuels. Stan looks into these different sources, and talks about how humanity will continue to use energy in the future as populations grow and energy resources become more scarce.

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Video 30 Aug
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Video 29 Aug 39 notes

kittehkats:

You’re Setting Up Your Litter Box All Wrong!

Litter Box 101 - from Jackson Galaxy and Cat Mojo

read the comments on the video for more: here

Link 27 Aug 1 note We are about to find out if our universe really is a hologram»

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