How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Are teeth unique?
“Every person's teeth are unique, which is why dental records are used to identify people.”
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.
Who invented DNA fingerprinting?
Alec Jeffreys invented DNA fingerprinting in 1984.