When will the world end, and have you made any bet/deal to anyone about the world ending?
In a billion years when the sun eventually explodes.
Who ever said it was going to explode? It may just burn out quietly...
Not to be an envirocigarette but I'm pretty sure at humanity's rate of loving things up, earth will be uninhabitable long before the sun dies. But you and me don't have to worry about that happening in our lifetime.
You're so sure of this? You'd be surprised what a couple of nukes can do at any time North Korea decides to flex their political snake.
That is if they ever figure out how to make an ICBM.