This would have been helpful.
Nickelodeon / Loryn Brantz / BuzzFeed
String Theory
Nickelodeon / Loryn Brantz / BuzzFeed / Via math.berkeley.edu
Sex
Nickelodeon / Loryn Brantz / BuzzFeed / Via parenting.com
The Cold War
Nickelodeon / Loryn Brantz / BuzzFeed / Via historylearningsite.co.uk
