Obviously, this is from "The Underwater Menace" when the over the top villain admits to the Doctor that he wants to drain all of the oceans in the Earth to the core to destroy it. This was also something that happened in a parallel universe the Third Doctor visited when a group of scientists tried to dig into the Earth's core and caused it to explode.

Would something like this happen in real life, or it'll take more than that to destroy the planet?