[quote]ice king was a russian named sergei simonov.[/quote] *Simon Petrikov

something like that. it was one of the latest episodes. there is a 1000 year lapse between "land of oo" and planet earth. she's a small, sickly girl that simon takes care of after the apocalypse.

It's official: Adventure Time is the setting for Fallout 4.

Actually no, several episodes prove that it was an asteroid smashing into the earth after the war. Well not prove but most evidence points at this theory.

[quote]The Lich's exact origins are ambiguous. However, he seems to originate from the explosion of the Mushroom Bomb (the atomic bomb that ended the The Mushroom War and is the cause of the unnatural creatures of Ooo, such as Candy People and Sign Zombies.) When Finn wishes that the Lich never existed, he then prevented the Mushroom Bomb from ever going off, thus creating the Farmworld alternate dimension. In the Farmworld dimension, Simon Petrikov (previous form of The Ice King) prevents the Mushroom Bomb from going off, killing himself in the process and sending the world into a 400 year long Ice Age. After this Ice Age, life continued un-mutated for approximately 600 years, and characters such as Farmworld Finn were created.[/quote] Check the Adventure Time Wiki dude, it's all there.

:O I didn't see that episode.