The radiation was discovered by the United Earth Directorate, and psi disruptors invented by Egon Stetmann generated this radiation to weaken the zerg. This radiation was later implemented by the Terran Dominion into their psi block in order to slow zerg speed and reaction time.
- ↑ 1.0 1.1 Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Zerg research (in English). 2010.
- ↑ Blizzard Entertainment. StarCraft II: Heart of the Swarm. (Activision Blizzard). PC. Mission: Heart of the Swarm, The Reckoning (in English). 2013-03-12.
- ↑ Zahn, Timothy (November 8, 2016). StarCraft: Evolution. Del Rey Books. ISBN 0425284735.