The human brain has the capacity to store everything that you experience.
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An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
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Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
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The human brain uses approximately as much energy as a 10 watt light bulb.
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Yawns are more contagious among people with closer relationships.
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
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Poor eyesight (myopia) is associated with higher IQ.
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