Why There Are Really Only 8 Types Of People In The World

Feb 7, 2015
This video, by the YouTube channel SciShow, explores how blood types narrow the world's vast population of nearly 7.3 billion individuals to just eight types of people. Considering the sheer number of humans on the planet, eight different types really is not many at all. The video breaks down humans based on two factors, the first of which is blood type.

The clip explains that blood types are derived from the types of agglutinogens found in the person's blood, which narrows things down to a simple A or B. The second factor to determine a human's type is the RH System, determined by either positive or negative. Using these numbers alone, humans can be placed into one of eight groups.
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