John Green & Hank Green Youtube Stars
John Michael Green (born August 24, 1977 in Indianapolis, Indiana) is an American author of young adult fiction and a YouTube vlogger. He is also a #1 Best Selling author on the New York Times Bestseller list.
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http://www.youtube.com/watch?v=lTTvKwCylFY
He's written a couple of books, and both him and his brother make awesome videos on youtube about world history, biology, science, video games, among many many other things.
William Henry "Hank" Green II (born May 5, 1980, in Birmingham, Alabama) is a professional entertainer and entrepreneur. He is best known for his online video blogs with his brother, John Green.
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http://www.youtube.com/watch?v=P3GagfbA2vo
Their channels:
http://www.youtube.com/user/vlogbrothers
http://www.youtube.com/user/scishow
http://www.youtube.com/user/crashcourse
http://www.youtube.com/user/truthorfail
http://www.youtube.com/user/hankschannel
http://www.youtube.com/user/hankgames