So, instead of dying like Gollum, who dove into a bubbling volcano in the book and film "Lord of the Rings: Return of the King," a simple physics analysis indicates you would stay buoyed on top. This wouldn't save you from a gruesome fate, however: Resting on a bed of molten rock four times hotter than the broiler in an oven, you'd quickly burst into flames and burn to death.
Now imagine 1,500 of these suckers all shooting off at once. That's how many active volcanoes dot the Earth, plus an unknown number hidden under the ocean. Every day, between 10 and 20 volcanoes are erupting somewhere on Earth, but scientists say the chance of every volcano on the planet erupting at once is so small that it's impossible. But what if it did happen? Would Earth as it we know it survive? Not likely, said Parv Sethi, a geologist at Radford University in Virginia.