The average person blinks 12 times a minute (bet you just blinked!).

The average person blinks 12 times a minute (bet you just blinked!)

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You breathe in approximately ten thousand litres of air every single day

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Everyone has one eye that is slightly stronger than the other

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Both sperm and egg only contain half the DNA required to create a human

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The retinas inside the eye cover about 650 square mm and contain 137