The adult human brain weighs about 3 pounds (1,300-1,400 g).
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The human brain doesn't stop developing until about 25 years old.
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If you are cold you are more likely to be hungry because you use energy to keep warm.
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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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An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
Enamel is hardest substance in the human body.
61
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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