Sonic the Hedgehog Sonic the Hedgehog Sonic the Hedgehog is a video game franchise produced by Sega centering on a series of high-speed platform games. Sonic, the protagonist, is an anthropomorphic blue hedgehog with supersonic speed. Typically, Sonic must stop antagonist Doctor Eggman's plans for world domination, often helped by his friends, such as Tails, Amy, and Knuckles. The first "Sonic the Hedgehog" game, released in 1991, was conceived by Sega's Sonic Team division after Sega requested a mascot character to compete with Nintendo's mascot Mario. Its success spawned many sequels and helped Sega become one of the leading video game companies during
Sonic hedgehog postdoctoral fellow at the Tabin Lab, after he saw a Sonic comic his daughter had brought from England. In the zebrafish, two of the three vertebrate "hh" genes are duplicated: "SHH a", "SHH b" (formerly described as "tiggywinkle hedgehog", named for Mrs. Tiggy-Winkle, a character from Beatrix Potter's books for children), "ihha" and "ihhb" (formerly described as "echidna hedgehog", named for the spiny anteater and not for the echidna character Knuckles in the "Sonic" franchise). Of the "hh" homologues, "SHH" has been found to have the most critical roles in development, acting as a morphogen involved in patterning many systems,