The higher your IQ, the more dreams you have.

The higher your IQ, the more dreams you have

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In the right conditions and lighting, humans can see the light of a

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If you lined up all the eyelashes shed during one human life, they would

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When you swallow, your food travels down your oesophagus to your stomach

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Common dreams are about potted plants, worms and frogs

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A healthy (non-colorblind) human eye can distinguish between 500 shades