Why do people migrate?
What caused early people to migrate?
BI Science. "Animated Map Shows How Humans Migrated across the Globe." YouTube. YouTube, 3 June 2015. Web. 10 Jan. 2016. <https://www.youtube.com/watch?v=CJdT6QcSbQ0>.
Dj2baduk. "Human Ancestry - Made Easy." YouTube. YouTube, 23 June 2008. Web. 09 Jan. 2016. <https://www.youtube.com/watch?v=gW-0by_hZYI>.
Gilbert, Tina. "The Earliest Human Migration." YouTube. YouTube, 4 Oct. 2012. Web. 10 Jan. 2016. <https://www.youtube.com/watch?v=B5orVEJburQ>.
Oppenheimer, Stephan. "JOURNEY OF MANKIND - The Peopling of the World." Journey of Mankind. Bradshaw Foundation, 2011. Web. 10 Jan. 2016. <http://www.bradshawfoundation.com/journey/>.
