While we can detect 10 million unique colours, we are all colour blind from birth.

While we can detect 10 million unique colours, we are all colour blind

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When you sneeze, it comes out at around one hundred miles per hour

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

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“Don’t It Make My Brown Eyes Blue” is a song recorded by American

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The farthest you can see with the naked eye is 2. 4 million light years

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Your eyeball weighs around 30 grams

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There is enough iron in your body to make a nail 8cm long!