The human eye can detect a single photon of light in complete darkness.
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Particles can exist in multiple states until observed.
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Time moves slower in gravity.
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The use of ultrasound improved prenatal care.
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The Earth's inner core is primarily iron and nickel.
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Pterosaurs were flying reptiles, not dinosaurs.
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The Earth's magnetic field originates in its molten outer core.
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Rats have demonstrated empathy in laboratory studies.
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