The Evolution of Getting Punched in the Face

SciShow delivers the latest in science news, including how fist-fighting fueled the evolution of the human face, new insights into the origin of schizophrenic “voices,” and new research into the bird flu.
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Sources:
http://www.bbc.com/news/science-environment-27720617
http://www.eurekalert.org/pub_releases/2014-06/uouh-dvs060414.php
http://www.sciencemag.org/content/344/6188/1178
http://www.eurekalert.org/pub_releases/2014-06/sjcr-bcp060514.php
http://www.ncbi.nlm.nih.gov/books/NBK10906/
http://www.eurekalert.org/emb_releases/2014-06/cp-sfv060514.php

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