What is the deal about the Polar Bears?
The polar bear question surfaced in the pilot as a puzzling mystery when a survivor's scouting party is attacked by one (and Sawyer pulls a gun and kills it). The polar bear is last seen in Season 3 episode, "Further Instructions."
Since it was one of the first "shock" revelations in the series, fans continue to hark back on the polar bear question to try to find some deeper revelation in the underlying LOST mythology.
Why were polar bears on the island begs Charlie's question, not where but "what is the island?"
According to Dharma information, polar bears were brought to the island for experiments. On the Hydra Island, they were kept in cages. They learned to get out fish biscuits from a complex puzzle machine. Dr. Chang in a film indicated that the bears were used for studies in electromagnetic research. The bears were used to test the frozen donkey wheel chamber, and were transported to the desert of Tunisia, where Charlotte found the remains of one with a Dharma collar tag. Ben and Locke also wound up at this exit point after turning the FDW.
For creationists (those who believe the island is the mental creation of some one or group), Walt was reading Hurley's comic book which contained a picture of a polar bear. The theory is that Walt's mental abilities created the polar bears on the island.
Another explanation was contained on the Blast Door Map. The Latin name for "polar bear", Ursus maritimus, is mentioned on blast door diagram, implying that the bears were used during experiments on the Island as follows: "STATED GOAL, REPATRIATION ACCELERATED DE-TERRITORIALIZATION OF URSUS MARITIMUS THROUGH GENE THERAPY AND EXTREME CLIMATE CHANGE. Valenzetti theorists would conclude that polar bears experiments to change arctic animals behavior and adaptation of harsh climates was an attempt to change the variables in the doomsday equation for humanity.
Alien theorists (those who believe aliens or alien technology was the root of the Island powers) thought this description was for the cosmic constellation of Ursus Maritimus, as an origin or nexus point in time space to the Island and its creators.
The science or science fiction aspects of the reasons why polar bears were on the island faded away but remained a gnawing mystery in some fan's minds. After the purge, why were the polar bears let out of their cages? Why use large, dangerous animals like bears to conduct experiments when the closest human counterpart is monkeys? Or in Ben's case, he directly used human subjects in his experiments to find a solution to the fertility problem.
The use of polar bears roaming a tropical jungle island was an absurd and strange hook in the pilot episode. It could be viewed now as a symbol or metaphor that the Island was not a real island, but a different place or realm where our notions of reality are not the rules.
