The Challengers of the Unknown is a fictional group of adventurers appearing in comic books published by DC Comics. The quartet of adventurers explored paranormal occurrences while facing several fantastic menaces. The characters were created by Joe Simon and JJack Kirby during the end of their company, Mainline Comics. Following the end of the Challengers comic, DC has revived the characters in different incarnations over the years. Some have claimed that Kirby reworked the basic concept of the series with Stan Lee in 1961 to create The Fantastic Four, the first creation that marked the rise of Marvel Comics.
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