We're having a birthday party for SteelyKid tomorrow, so I have a ton of stuff to do today. I may have something more substantive later, but for the moment, here are a couple of videos to enjoy. First, from the Minute Physics set of videos at YouTube, an explanation of why you have quantum physics to thank for sunny days:
There's a bunch of good stuff in the Minute Physics channel, so if you're looking for a way to kill time in small chunks, have at it.
And if you prefer your physics to be classical, this demo from Harvard has been making the rounds:
Isn't physics awesome? Of course it is.
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