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Slideshow: One of Denver’s two famed polar bear cubs dies in Ariz.

TUCSON, Ariz. — Born at the Denver Zoo nearly two decades ago, Klondike and Snow touched a generation of Coloradans and reached others around the nation.

Sadly, it has now been confirmed that Snow died unexpectedly Sunday night at a zoo in Tucson, Ariz.

Snow, who had been with her brother Klondike since the two were born in Denver in 1994, was moved to from Orlando, Fla. to Tucson in February due to skin allergies. Experts believed the drier climate would suit her better.

Animal care teams at SeaWorld Orlando, where Klondike and Snow had lived together for 17 years, made numerous attempts to provide treatment for Snow’s allergies before separating the two. Klondike still calls SeaWorld home.

The brother and sister gained national attention in 1994 when their mother, Ulu, rejected them at birth. A year after they were born they were moved to Orlando.