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The Challengers of the Unknown are a team of professional adventurers who regularly cheat death on their missions of discovery and exploration. Members include scientist Walter "Prof" Haley, pilot Kyle "Ace" Morgan, daredevil Matthew "Red" Ryan, wrestler Lester "Rocky" Davis and scientist June Robbins, all operating out of Challengers Mountain in the Rockies. The Challengers were created by Jack Kirby, first appearing in Showcase #6. (1957) ||