The barreleye fish has a transparent head and upward-facing eyes.
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The human skeleton is made up of over 200 bones in adulthood.
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The primacy effect describes better recall of early information in a sequence.
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The human body produces heat through metabolism.
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Your bones are stronger than steel.
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A lion's roar can be heard from several miles away.
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Smiling can influence mood through feedback to the brain.
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Vaccines train the immune system to recognize pathogens.
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The human brain contains about 86 billion neurons.
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