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Using special software and a 3D printer, a professor at Israel's Technion University has made real 3D objects that can't really exist.

And yet he made them.

Here's the video: https://www.youtube.com/watch?v=cmr4HqjSSw4

(I'll spoil the trick: These objects only take on their impossible characteristics when viewed from a very specific angle. Still, it's a neat trick!)
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