[Okay, that tears it. He's so interrogating Heero for more information when he comes back. He feels like his brain's about to explode from the sheer crazy.]

Earth's a planet, dude. Not a colony. Maybe there's a colony named after the planet, but... hell, if humans aren't on Earth, what would be?

[He folds his arms, inwardly wondering if maybe he should find this guy and have a more personal kind of talk with him. What he's saying is unsettling, and what he's saying that isn't unsettling is downright fucking terrifying.]

No... no, there's no way there could be two Earths. I don't understand half of what you're saying, but I do understand that much.