The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
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One cubic foot of gold weighs more than 1,200 pounds!
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One 75-watt bulb gives more light than three 25-watt bulbs.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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Balsa wood is classified as a hard wood!
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Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
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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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