Redheads require up to 20% more anesthesia to be knocked out.
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Intelligent people have more zinc and copper in their hair.
233
One human hair can support 3 ounces.
191
Only 2% of the worlds population is blonde.
15
Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
7
In 1996, research found that having excessive body hair is linked to higher intelligence.
23