The Samaarians engineered other races, including the Ganglion and the Zaruboggan. This was not an altruistic act of creation—these races were made to serve Samaarians, and were built with failsafes to ensure that servitude. To control the Ganglion, the Samaarians encoded a failsafe directly into Samaarian (human) DNA: If the Ganglion ever turn against their Samaarian makers, then mere exposure to human DNA is lethal to them. Since the Ganglion betrayed the Samaarians long ago, their race has a visceral hatred for humans and a fear of ever coming into physical contact with them again.