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Laser-etching a Coin
Posted 6 years ago by
blackflagger
in category:
technology
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Mirror selfie
Posted 6 years ago by
boyt
in category:
misc
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Omnidirectional Treadmill
Smarter Every Day
Posted 6 years ago by
Mad2013
in category:
technology
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The Black Hole Bomb and Black Hole Civilizations
Kurzgesagt
Posted 6 years ago by
nypd
in category:
interesting
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How the ISS toilet works
Posted 6 years ago by
buju
in category:
space
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