A century prior to the series' opening, Aang, a 12-year-old Airbender of the Air Nomads' Southern Air Temple, learned from the elder monks that he was the Avatar. Usually, the Avatar is told of his or her true identity after turning sixteen; however, the monks feared that a war between the four nations was on the horizon and that soon the Avatar would be required to maintain balance and order in the world. Shortly thereafter, the monks decreed that Aang would be separated from his guardian, Monk Gyatso, and sent to the Eastern Air Temple to complete his training. Two siblings make a discovery Confused, frightened, and overwhelmed by these recent events and his new responsibilities as the Avatar, Aang fled from his home on his flying bison, Appa. While traveling over frigid southern ocean waters, a sudden storm caused Appa to plunge deep into the sea. Aang unconsciously entered the Avatar State, and used a combination of Airbending and Waterbending to protect Appa and himself. By creating an air bubble around them and then freezing it, Aang was able to ensure that he and Appa could breathe and be protected from the storm until it dissipated. However, the storm transferred the bubble very near the south pole and it could not thaw, forcing the two of them into a state of suspended animation

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