Zolander
this alien race was native to the planet Zolan, living in the frozen arctic regions to which they became adapted over the generations. Unlike the religious Clawdites, the Zolanders were known for their warrior caste and martial prowess. Many centuries before the onset of the Clone Wars, the Zolander people discovered that their sun had begun sending out stronger and stronger emissions of radioactivity. Scientists tried to trigger a long-dormant gene in the Zolander skin cell, hoping to activate a natural protection against the radiation. Unfortunately, the experiment failed to elicit the desire results. Instead, it triggered an ability to alter one's physical appearance, thereby creating the Clawdite race over the succeeding generations. The Zolanders ostracized the original Clawdites, and waged many civil wars to keep the changelings at bay. The Zolanders' hatred of the Clawdites deepened when the Empire blockaded Zolan and prohibited any travell off-planet, in a effort to keep the Clawdites under contro. As soon as the Empire was defeated at Endor, full-scale civil war broke out on Zolan. The Clawdites, however, were better prepared for war, and quickly subjugated the Zolanders. Note that Star Wars Insider, issue 70 indicates that radioactive bombardment from outer space triggered the change in the Zolanders, rather than a failed experiment, resulting in the creation of the Clawdite race.