He smiles slightly and gives a slow shrug. "I didn't learn any there... But I've read a lot of Stephen Hawking's work... As well as Imagining the Tenth Dimension..." He says softly, pulling a small white book from his backpack. "I know about the Twins theory, where if one were to leave in a rocketship traveling near the speed of light and return to Earth twenty years later, he would have aged much less than his now much older twin."