Check out YouTube's top trending educational videos in 2013.
1. Which Came First - The Chicken or the Egg? via AsapSCIENCE
2. Immovable Object vs. Unstoppable Force - Which Wins? via minutephysics
3. Why Do We Kiss? via Vsauce
4. Is Your Red the Same as My Red? via Vsauce
5. How Old Are Your Ears? (Hearing Test) vis AsapSCIENCE
6. Amazing Facts to Blow Your Mind Pt. 2 vis AsapSCIENCE
7. What If the Sun Disappeared? vis Vsauce
8. What Your Body Does in 30 Seconds via BuzzFeedVideo
9. Canada & The United States: Bizarre Borders Part 2 via CGP Grey
10. The True Science of Parallel Universes via minutephysics