The human eye can distinguish about 10 million different colours.
Fact #11483
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Border collies can learn hundreds of word-object associations.
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The primacy effect describes better recall of early information in a sequence.
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Vaccines train the immune system to recognize pathogens.
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Sea turtles have existed for over 100 million years.
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Certain parrots can learn to mimic human speech.
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The human body contains trillions of cells.
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The human body has over 600 muscles.
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The human eye can detect a single photon.
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