Science Friday: How Einstein proved E=mc²

Two minutes of physics prove the famous calculation

If you've ever wondered how Einstein arrived at his famous calculation, YouTuber "minutephysics" has you covered. In about two minutes, here's how he did it:

Now if we could just find cats that emit light energy. Oh, wait, we already have:

Keith Shaw rounds up the best in geek video in his ITworld.tv blog. Follow Keith on Twitter at @shawkeith. For the latest IT news, analysis and how-tos, follow ITworld on Twitter, Facebook, and Google+.

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