Intelligent people have more zinc and copper in their hair.
233
One human hair can support 3 ounces.
191
Redheads require up to 20% more anesthesia to be knocked out.
112
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
Human hair and fingernails continue to grow after death.
7