How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Does everyone get wisdom teeth?
“Many people never develop some or all of their wisdom teeth.”
Reference: American Dental Association
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What is the hardest substance in the body?
Tooth enamel is the hardest substance in the human body.
How much energy does the brain use?
The brain makes up only about 2% of body weight but uses about 20% of the body's energy.