Board Thread:Lore Discussion/@comment-1600847-20140819183355/@comment-24001601-20140819193713

they said it was slowly becoming less habitable and talos was on of the last to leave atmora

2 idk

3 it was a combo of being dragonborn, the only mortal that can truly kill dragons, achieving the chim so becoming a living god like Vivec and taking over all of Tamriel