Giant-Man  (Henry Pym;  William Barrett "Bill" Foster)
   
     Second costumed identity assumed by Henry Pym, who had earlier helped found the Avengers as Ant-Man. 

     He later assumed new costumed identities as Goliath and Yellowjacket (his current alias), and for a time operated with the Avengers as the plainclothes Doctor Pym. 

     All four of his costumed identities have been assumed by one or more other people. For instance, Pym's occasional research partner Bill Foster has used Pym's growth serum to operate as a superhero: first as Black Goliath, later as a new Giant-Man, and more recently as the new Goliath.

  
     As Giant-Man, Pym could increase his bodily size at will, and sometimes employed special technological accessories, such as cybernetic circuitry enabling him to control insects.

Giant-Man (Doctor William Barrett "Bill" Foster):
     Second costumed alias used by biochemist Bill Foster in his double life as a costumed adventurer.  A longtime associate of the Avengers in his civilian identity, Foster used Hank Pym's growth serum to become a superhero as Black Goliath, later changing his alias to Giant-Man. As Giant-Man, he once aided a contingent of Avengers against the High Evolutionary. 

     During his later exploits as Giant-Man, Foster had modified Hank Pym's growth formula so that his mental capacity and sensory acuity increased along with his bodily size and physical strength. 

     More recently, Foster has employed the costumed alias Goliath.

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