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This ball is on a roll. In this optical illusion, you’ll see a hand place a metal ball at the bottom of what looks like an ordinary slide. However, it immediately rolls uphill, seemingly defying the ...

Print the optical illusions (included below) and cut them out as instructed. Follow specific instructions (below) for each optical illusion image. An optical illusion is something that tricks your ...

Arthur C. Clarke once famously quipped that "any sufficiently advanced technology is indistinguishable from magic." So perhaps it was inevitable that the Pentagon's extreme technology arm would ...