Support Vsauce, your brain, Alzheimer's research, and other YouTube educators by joining THE CURIOSITY BOX: a seasonal delivery of viral science toys made by Vsauce! A portion of all proceeds goes to Alzheimer's research and our Inquisitive Fellowship, a program that gives money and resources directly to growing science channels here on YouTube! https://www.curiositybox.com Follow Michael Stevens http://www.twitter.com/tweetsauce Geek and Sundry: http://www.youtube.com/watch?v=6-Wef0694aY http://www.Facebook.com/VsauceGaming music courtesy of http://www.SoundCloud.com/JakeChudnow Thanks to: http://www.youtube.com/phoenixsaintly and http://www.youtube.com/theINENIvlogs For helping me with this video at Summer in the City!! theINENIvlogs behind the scenes Summer in the City vid with me: http://www.youtube.com/watch?v=F_Rd35906MQ Why videos views freeze in the 300s on YouTube (sub to this channel FTW, seriously): http://www.youtube.com/watch?v=oIkhgagvrjI Japan Earthquake and Earth's rotation: http://en.wikipedia.org/wiki/2011_T%C5%8Dhoku_earthquake_and_tsunami#Geophysical_effects All people in one place LIVING: http://persquaremile.com/2011/01/18/if-the-worlds-population-lived-in-one-city/ shoulder-to-shoulder: http://news.nationalgeographic.com/news/2011/10/111031-population-7-billion-earth-world-un-seven/ BBC Jump Video: http://www.bbc.co.uk/learningzone/clips/if-the-whole-world-jumped-at-the-same-time-would-the-planet-move/13428.html SCALE OF UNIVERSE AWESOME: http://htwins.net/scale2/ STRAIGHTDOPE article on a jump: http://www.straightdope.com/columns/read/142/if-all-chinese-jumped-at-once-would-cataclysm-result Dot Physics on the jump: http://www.wired.com/wiredscience/2010/08/what-if-everyone-jumped/ Interactive scale of the universe: http://scaleofuniverse.com/ Decimate: http://www.etymonline.com/index.php?allowed_in_frame=0&search=decimate&searchmode=none Dunbar's Number: http://en.wikipedia.org/wiki/Dunbar's_number NPR story on Dunbar's number: http://www.npr.org/2011/06/04/136723316/dont-believe-facebook-you-only-have-150-friends Life Expectency: http://en.wikipedia.org/wiki/Life_expectancy How many people you meet in your life: http://eclectic24.wordpress.com/2009/03/15/how-many-people-will-you-meet-in-your-lifetime/ Newton's Third Law: http://www.physicsclassroom.com/class/newtlaws/u2l4a.cfm