Stare at the middle. Are the lines horizontal or diagonal or do they look curved?
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Comments
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It hurts my eyes if I look at it too long.It's a good ilussion though. +1
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horizontal
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They are curved. So confusing!
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How is this biology?
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haha sorry, but i think this game is for physics and chemistry, not biology XD
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this is so old
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i think they are straight
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aahhh +1
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they are straight ! hard to tell bu eye but easy with the line tool
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AW-E-SO-ME!