The crew over at Vsauce has set out to answer a very important and critical question: would car headlights work at the speed of light? Unsurprisingly, the answer is not simple, but in the process, you do learn a lot about general relativity and photons and other sciencey stuff.
via Gizmodo http://ift.tt/1asoX0y http://ift.tt/1asoX0s
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