adventure time Marceline Bonnibel 2880209

Finn and Jake~~the last battle with Ice king and the firey キッス

Hail was falling out of the sky rapidly, hurting the people of ooo. Finn and jake had just returned from their fight with a bunch of trolls. Jake looks up at the sky and gwets clonked on the head with potatoe shaped hail.

"What the heck?" jake hissed while looking at the hail.

"You think its evil hail?" finn asked jake pulling him up..Jake is quite for a 分 and begins to think about this situation.

"it might be ice king." jake replied. "He must be having his tantrums, should we go kick his butt." out of no where, a 火災, 火 knight...

So we're all know that Marcy is a thousand years old vampire - former half human and キノコ war only happened when she was a little girl (less than 10 years old, i think) but there is another human whose name's Finn is just only 14...So why in the present ( which is after キノコ war 1k years), there is one human left in the land of Ooo(who is Finn) and he is just only 14? There are at least 2 explainations for that:

1.The humans didnt really "get killed" all in the キノコ war and some of them didnt get mutated after the war, they still re-created pure human generations until about 12 years...