Here's an article that presents 101 facts (deadliest earthquake, longest mountain chain etc)about Earth in a Q&A format. Very interesting stuff indeed.
Q101: Will Earth always be here?
Astronomers know that over the next few billion years, the Sun will swell so large as to envelop Earth. If we're still here, we'll probably fry and the planet will be vaporized. There's a chance, however, that the changing mass of the Sun will cause Earth to move into a more distant and pleasant orbit. One mathematical calculation shows it would be theoretically possible for humans to engineer such a move before it's too late