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Science and Math
Science and Math World

Spiral illusion. Stare at the middle. Do you see the spiral? But these are just circles!

Mathematicians finally cracked LÃ¡szlÃ³ Fejes TÃ³thâ€™s zone conjecture, a 44-year-old geometry problem! Learn about it here: http://bit.ly/2Cxqp0C

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