Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
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One barrel of petroleum holds 42 gallons.
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Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
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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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