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CrashCourse · 发布于 2012年3月26日
Hank and his brother John discuss heredity via the gross example of relative ear wax moistness. This video uses sounds from Freesound.org. References: http://www.mpiwg-berlin.mpg.de/en/research/projects/DeptIII_Cultural_History_Heredity http://www.pbs.org/wgbh/nova/genome/her_ari.html http://www.universityofcalifornia.edu/news/article/4465 http://www.nytimes.com/2006/01/29/science/29cnd-ear.html http://udel.edu/~mcdonald/mythearwax.html Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids
