The world's most precise clocks, optical lattice clocks, lose less than one second every 15 billion years.
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Water covers more than 70% of Earth's surface.
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The human eye can distinguish millions of colors.
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Certain parrots can learn to mimic human speech.
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The invention of dialysis allows patients with kidney failure to survive.
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The axolotl can regenerate limbs and spinal tissue.
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The barreleye fish has a transparent head and upward-facing eyes.
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The human brain contains about 86 billion neurons.
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Multitasking often reduces overall task performance.
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