that desert spot, i presumed, was the same "exit" that ben and locke landed in after spinning the island wheel of fortune.
dr. hanso (or whatever miles' dad's name eventually became) also alluded to the bears in season 5, when he threatened hurley to have to de-poop them after their use in other dharma scientists' "ridiculous experiments"
again, this was never addressed or spoken of or hinted at, which is an aspect of the show (and finale) everyone got upset with. me, i kinda like the "well you figure it out" aspects of the show, where we can sit and speculate that dharma experimented with the wheel, letting polar bears take the hit.
