It all started 981,234,767,821,456,127,894,374 billion years ago, before the universe existed. The Great Bunny of Christ's Resurrection decided he was hungry, and also that he needed to lay an egg. Because although regular bunnies (especially male ones) don't do that, Great Bunnies of Christ's Resurrection do. They pretty much do whatever they want. So first, he ate a Snickers bar, and then he laid an egg, and then he basically got bored. So he put lots of little "people-things" on the egg, because they're stupid and tend to blow each other up. (Fun to watch.) He named it... "Earth."