Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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A 'jiffy' is an actual unit of time for 1/100th of a second!
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Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
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Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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Iron weighs more after it rusts.
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One 75-watt bulb gives more light than three 25-watt bulbs.
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