• markhacks (25)in #science • 8 years ago

  Amazing Matchstick Trick

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• markhacks (25)in #science • 8 years ago

  Amazing Skittles Rainbow

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• markhacks (25)in #science • 8 years ago

  Amazing Refraction Of Light In Water

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• markhacks (25)in #oddly • 8 years ago

  Amazing Sand Pendulum

  Hi, today I would like to introduce you sand pendulum drawing lissajous patterns. Enjoy this video! Mark Hacks

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• markhacks (25)in #oddly • 8 years ago

  Stuff In Reverse

  Hi guys, I would like to introduce my first video that I published last year. I just shot some things backwards. I made some more videos, but I would like to do much more. And…

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