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Christopher Yost (born February 21, 1973) is a writer responsible for his own animated universe comprised of Wolverine and the X-Men, Hulk Vs, The Avengers: Earth's Mightiest Heroes, and Thor: Tales of Asgard. He and Craig Kyle are also responsible for the creation of X-23, a character whose appearance in X-Men: Evolution proved so popular she was adapted into the Marvel Comics and other media.
He has written for X-Men: Evolution, Fantastic Four: World's Greatest Heroes, Next Avengers: Heroes of Tomorrow, and Hulk Vs. He is also the story editor on Fantastic Four: World's Greatest Heroes, the first season of Iron Man: Armored Adventures, and The Avengers: Earth's Mightiest Heroes.
Yost began working for Marvel in 2002 as an intern. His scripts caught the attention of Marvel executives who hired him to write for X-Men: Evolution. He began writing for Marvel's X-Men comic book and even wrote for DC Comics.