Tired of his race's isolation, the being that became known as Martian Man, fled to Earth in the 1970s and took on the identity of a super hero. The public believed for years that Martian Man was really just a super powered human trying to conceal his true identity from the public through the guise of a martian. After years of surface, Martian Man joined the Guardians of the Globe but was later killed by Omni-Man when he killed off the team. Shapesmith is the inheritor of his position on the team.
Powers & Abilities
Not much is known about his powers, but he was known to be able to fly past atmospheric levels, and shape-shift into various forms, much like Martian Manhunter. It is also inferred that he has some form of super-strength.