The Wasp was created by Stan Lee and Jack Kirby as a sidekick and love interest for Hank Pym, who in the time went by his Character in Tales.
The Wasp became a member of the Avengers and its first member, in addition to the personality.
Getting the most of sub-atomic Pym particles, the Wasp owns the capability to alter her size, causing the mass to be shunted to of her body or obtained from another dimension called Kosmos. She is able increase to a maximum of several hundred feet or to shrink to a minimum of half an inch. Bigger sizes or smaller are possible however, the effort starts to put a strain. These skills stemmed from usage of a Pym particle gas released from specific capsules. Over time, however, her body has absorbed particles to allow her to alter her size .
Her strength degree increases because her body's mass is compacted. At giant size, her strength and endurance increase geometrically with her elevation, reaching superhuman levels. Despite the benefits of giant-size, Janet prefers to stay the diminutive Wasp, calling on her expansion power in times of crisis. At tiny size, the Wasp develops a pair of translucent insect wings from her back, a result of genetic modifications supplied by Hank Pym. These give her the power of flight at speeds.
In the Marvel Cinematic Universe, Wasp was a costumed S.H.I.E.L.D. agent throughout the 80's, working alongside Hank Pym. At an point that was particular she married him and they had a daughter, Hope. In 1987 she undertook a mission to disable a Russian missile. Unfortunately, they could not breach the missile's titanium shell. In order to breach it, Janet shrunk to sub-atomic levels that were dangerous and destroyed the bomb in the expense of her life.
Janet plays a significant part in the sequel. In the movie, it's shown that Janet survived her apparent death, but ended up trapped for decades inside the Quantum Realm. The heroes set out to locate Janet and bring her home after learning of her survival.