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: http://www.districtlines.com/Vsauce Music by Jake Chudnow: http://soundcloud.com/jakechudnow Great list of how famous people would approach the chicken question: http://www.bored.com/chickenjoke/ How we should all FIRST hear the chicken joke: http://ivy.comicgenesis.com/ E.B. White: http://www.quotationspage.com/quote/984.html Frog Dissection app: http://itunes.apple.com/us/app/frog-dissection/id377626675 Anti-Joke Chicken: http://www.quickmeme.com/Anti-Joke-Chicken/popular/1/ Anti-Joke Cat: http://twitter.com/AntiJokeCat "No soap, radio": http://en.wikipedia.org/wiki/No_soap_radio OLDEST JOKE: http://www.independent.co.uk/voices/commentators/paul-mcdonald-heard-the-one-about-the-oldest-joke-in-the-world-its-a-cracker-2164293.html Original Summerian: http://etcsl.orinst.ox.ac.uk/proverbs/c.6.1.01.html Agyrophobia: http://www.medterms.com/script/main/art.asp?articlekey=12168 Death Clock: http://deathclock.com/ Percentage of earth that is paved: http://www.artba.org/about/faqs-transportation-general-public/faqs/#9 Chicken Population: http://www.huffingtonpost.com/2011/07/29/domesticated-animal-populations_n_913464.html Mary had a little lamb (pics in video from a book I own): http://en.wikipedia.org/wiki/Mary_Had_a_Little_Lamb Computational theory of humor [pdf]: http://arxiv.org/abs/0711.2058