The human eye can detect a single photon.
Fact #1706
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The invention of the hypodermic syringe enabled effective drug delivery.
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Vaccines train the immune system to recognize pathogens.
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The first forests appeared during the Devonian period.
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The Earth completes one full rotation approximately every 24 hours.
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The Sumerians developed one of the earliest writing systems.
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An adult giraffe can clean its ears with its tongue.
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The primacy effect describes better recall of early information in a sequence.
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Rats can learn complex maze patterns quickly.
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