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Sonic the Hedgehog (Japanese: ã½ããã¯ã»ã¶ã»ããã¸ããã°, Hepburn: Sonikku za Hejjihoggu) is a platform video game developed by Sonic Team and published by Sega for the Sega Genesis console. The game was released in North America, Europe and Australia on June 23, 1991 and in Japan on July 26 of that year. It stars Sonic the Hedgehog in a quest to defeat Dr. Robotnik, an evil scientist who has imprisoned animals in robots and stolen the magical Chaos Emeralds.
At the time when the Hedgehog gene was isolated from vertebrates, Sonic the Hedgehog videogame was popular as I suppose one of the post docs that cloned it had a kid that liked to play Sonic the Hedgehog so that's how Sonic was given its name.n a normal embryo, the patterning of the nervous system happens on a temporal scale from head to tail basically, and it's almost like a zipper being closed. Hedgehog signaling is coming from the notochord to the overlying neurectoderm pattern: the head, then the trunk, then the tail, and so on.