Just behind our pupil is the lens - which is round, flat and thicker toward the middle.

Just behind our pupil is the lens – which is round, flat and thicker

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Only one of a baby’s bones is already fully-grown – it is the smallest

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The largest cell in the human body is the female egg, and the smallest

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When you blush, the lining inside your stomach also blushes!

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The first blue-eyed person is said to have lived 6,000-10,000 years ago

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Our eyes remain the same size from birth onward, but our nose and ears