To figure out what it would take to create the conditions for the land of Ooo to spring up, you have to get mathematical.
In my latest Because Science, I try to figure out if we have enough nuclear weapons to start Adventure Time‘s infamous “Mushroom War.” One option would be a nuclear winter. After a massive nuclear exchange, enough of the world’s infrastructure and forests are set ablaze to blot out the sun with ash and dust. Do we have the arsenal to make this happen? Or maybe radiation itself could do us in. If at least some humans could survive hundreds or thousands of nuclear blasts, would there be enough fallout to wipe out humanity? I give my best approximation above!