When is Earth going to explode and what signs should we be looking out for to prepare for such a catastrophic event?

Well, Earth isn't going to explode anytime soon, so no need for the panic button just yet. As long as the universe doesn't have a grudge against us, we should be safe for a good while. But hey, keep an eye out for any rogue asteroids or supervillains with doomsday weapons – you never know what drama the cosmos might throw our way.