Watch a pulse of light fly by ...

[marmoe]

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http://youtu.be/-fSqFWcb4rE

Scientists at the MIT were able to create a stroboscopic camera with an effective frame rate of one trillion frames per second. More info here:
http://raskar.info/trillionfps
http://femtophoto.info
http://web.mit.edu/newsoffice/2011/trillion-fps-camera-1213.html
Coverage at NYT and BBC.