Yes actually. Deathclaws were created by the united states military as a bioweapon. origionaly created from chemelions. the result created the first deathclaws. though the process removed much of their adaptability, they were still a potent weapon to be unleashed. after the war, the master got ahold of a matriarch and altered them, made them even more deadly. one of the things that makes them more deadly is they can gain traits from their food. note to everyone here, don't let them dine on nightstalkers.