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Top 10 optical il­lu­sions facts

Selected as the most interesting among optical illusions related questions in
Optical illusions quiz
Which continent is that? Australia.
This is Australia map, with north at the bottom side.
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continents facts
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Which continent is that? Africa.
This map of Africa is rotated so the continent shape resembles Australia.
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geography of Australia facts
Which shape is larger? None of them.
Both shapes are the same, but the bottom one is placed more to the right. This is however difficult to notice. It is known as Jastrow Illusion.
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geometry facts
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