The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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A single speck of dust is half way in size between a subatomic particle and the Earth.
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Liquid TIDE laundry detergent glows under a blacklight.
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4.5 pounds of sunlight strike the Earth each day.
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Iron weighs more after it rusts.
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German chemists made a replica of a trophy the size of one molecule.
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