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Add Yahoo as a preferred source to see more of our stories on Google. 3D optical illusion drawing hack We love a nice optical illusion (if you hadn't noticed), and happily the internet is full of ...

Optical illusions are no doubt interesting. At the same time, they often leave people baffled. Just like this optical illusion that may leave you scratching your head. What is even more interesting is ...

Artist James Nolan Gandy invents robot arms that sketch intricate mathematical shapes with pen and paper. When viewed in real time, the effect is impressive. But it becomes even more so when the ...