Jared and his younger half-brother Adrian were raised in the Hull House orphanage, which was actually a facility operated by the Canadian government's secretive Department H. While Adrian became shy, reserved and bookish, Jared became athletically inclined, aggressive, and arrogant. Both brothers manifested mutant powers after puberty: Adrian gained the ability to transform parts of his body into blades, while Jared manifested a personal force field that could not be shut down. The brothers were recruited into a new incarnation of the Canadian superhero team Alpha Flight.
They assisted the new Alpha Flight in battling several foes, including the Zodiac
, the Brass Bishop, and Department H's own power-mad leader, Jeremy Clarke, who died of radiation poisoning during a Zodiac raid on the Department H headquarters. Their Alpha Flight team fought several members of the original Flight and later teamed up with them to defeat a new Weapon X
, who had been created by a rogue Department H scientist. Both groups of Alphans merged into a unified Alpha Flight following this adventure. The Corbo brothers and several other members of the new team were later reassigned to Alpha Flight's trainee team, Beta Flight
Radius was later recruited into the X-Corps, a militaristic strike force founded by former Generation X headmaster and former X-Man Banshee. The X-Corps was ultimately betrayed by its criminal members, and Radius was defeated when the villain Avalanche opened a chasm beneath Radius, swallowing him. Jared survived the fall, though, and has been shown as one of the many depowered mutants in the aftermath of M-Day. It has also been revealed that Jared's biological father is the X-Men villain Unus the Untouchable.
Radius lost his powers after M-Day.
Radius could generate a permanent force field around him that he was unable to deactivate. He did not feel the impact of blows upon it. While the shield was generally porous enough for him to breathe, he could make it almost impervious, even to air.
He could also create extensions of the field to use as a ranged attack, and brace objects against it to give the illusion of super-strength.