The human heart beats about 100,000 times per day and around 2.5 billion times in a lifetime.
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The primacy effect describes better recall of early information in a sequence.
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The Megalodon lived millions of years before humans appeared.
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Pandas have a specialized wrist bone that functions like a thumb.
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A king cobra can raise a third of its body off the ground.
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The human eye adapts to darkness by increasing light sensitivity.
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The human eye can detect a single photon.
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The pacemaker regulates irregular heartbeats.
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A sloth can take up to a month to digest a single meal.
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