My new favorite bumper sticker

This is great! But only if you understand the physics of it.

Leonard and Sheldon would have this on their car.

My new favorite bumper sticker: "

Nerdy physics/astronomy humor FTW. If you don't get it (and it's OK if you don't, really), you might refer to Wikipedia's article on blue shift. You can buy variations of this bumper sticker all over the web, but I've no word, alas, on how to score one of these official APS versions. [via Neatorama]

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