text: The United States has a "Triton missle" on a couple nuclear subs, which is capable of destroying all life on the plantet, 3 times over, with a single weapon. \n\nBut destroying the actual earth, thats a different story, if we detonated several nuclear weapons in the core of the planet, theres no doubt in my mind that we could destroy it. But on the surface i dont believe its possible, the earth has taken direct hits from comets and asteroids, which both have far more power then any man made weapon, and the earth is still here. And also when a super volcano erupts, I believe that it was as powerful as 600 Hiroshimo bombs going off. \n\nOh and just incase you didnt know...Yellow Stone national park happens to be sitting right on top of a super volcano! haha