Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
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Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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Pumice is the only rock that floats on water.
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