The deepest borehole ever drilled was the Kola Superdeep Borehole in Russia — 12.2 km deep, drilled over 20 years.
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The brain named itself.
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Tyrannosaurus rex had teeth that could grow over 12 inches long.
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The axolotl can regenerate limbs and even parts of its heart.
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The Olympic Games are held every four years.
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The Dead Sea is one of the saltiest bodies of water on Earth.
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The Eiffel Tower was once the tallest man-made structure on Earth.
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The heart pumps blood through approximately 60,000 miles of blood vessels.
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The primacy effect describes better recall of early information in a sequence.
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