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Rob Liefeld became a prominent writer and artist in the 1990s, a period that has since been known as the "Image era". He is credited with helping to popularize the "extreme" style of comic book art, which is characterized by its exaggerated anatomy and violence. Liefeld's work on titles such as "Youngblood" and "Cable" helped to launch the Image Comics publishing company, which he co-founded in 1992.