Heterochromia refers to a condition where eyes are two different colours.

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Human Body Facts

Blue-eyed people share a common ancestor with every other blue-eyed

Human Body Facts

Blondes generally have more hairs on their head (145,000) than brunettes

Human Body Facts

Your eyes start to develop just two weeks after conception

Human Body Facts

Some people say that you only use around 10% of the power of your brain.

Human Body Facts

Spectacles had been treating long-sightedness for around for 300 years

Human Body Facts

Men produce approximately ten million sperm every single day