Avatar: The Last Airbender - History [Past Avatars] #3: Master of the Elements, Bridge Between Humans and Spirits. - Fan Forum

Avatar: Last Airbender's Real-Life Inspiration For Every Bending Power

Can firebenders lightbend? - Quora

A Full Timeline of the 'Avatar: the Last Airbender' Universe

Avatar: Every Element Aang Learned (In Chronological Order)

Katara, Avatar Wiki

In theory after Korra lost the connection to her past Avatars, shouldn't her Avatar state be the weakest? - Quora

Aang, Avatar Wiki

What is the big purple Aang shown when he unlocks the 7th chakra? - Quora

Montages: International Edition » The Last Airbender, Part I: Harmony of elements

Why are so many people say Aang is planet level to universal when the best he can get to is continent level? - Quora

SPOILERS* Why did Korra and the light spirit recombine at the end of Season 2? - Quora

Beginnings, Part 1, Avatar Wiki

In Defense of Avatar Korra - Black Nerd Problems

How soon after Aang ran away did the Fire Nation attack? If Aang never ran away, would he have been able to master all 4 elements in time? - Quora