What are Blood Types?

Quick Questions explains why, when it comes right down to it, there are really only eight kinds of people in the world.
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShow
Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow
----------
Looking for SciShow elsewhere on the internet?
Facebook:   / scishow  
Twitter:   / scishow  
Tumblr:   / scishow  
Thanks Tank Tumblr:   / thankstank  

Sources:
http://www.ncbi.nlm.nih.gov/books/NBK...
http://www.nobelprize.org/educational...
http://anthro.palomar.edu/blood/Rh_sy...
http://www.nlm.nih.gov/medlineplus/en...
http://www.rcsb.org/pdb/101/motm.do?m...
http://learn.genetics.utah.edu/conten...
http://www.northshore.org/community-e...
http://www.redcrossblood.org/learn-ab...