Esperanto, invented in 1887, is the world's most widely spoken constructed language with an estimated 2 million speakers.
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Some lizards can regrow their tails.
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The Earth's surface is constantly reshaped by natural forces.
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Some desert plants can store water for long periods.
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Certain birds use mud to construct their nests.
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Some amphibians undergo dramatic transformations during metamorphosis.
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Some species of frogs can survive being partially dehydrated.
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Some plants can survive in salty soil.
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Some lizards can detach their tails to escape predators.
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