Scientists in Germany have developed a candy that doesn't cause cavities.
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Elephants are among the most emotional creatures in the world - they have even been known to rescue other animals, such as trapped dogs.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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If you place a ripe banana next to a green tomato, the tomato will ripen due to the ethylene gas produced by the banana.
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Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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