Parrots can understand abstract concepts like zero and have shown problem-solving abilities on par with five-year-old children.
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An ostrich's eye is larger than its brain.
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The human body glows faintly in complete darkness.
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The eruption of Krakatoa in 1883 was heard thousands of miles away.
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The human body replaces many of its cells regularly.
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The stegosaurus had a brain about the size of a walnut.
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