Hi all, I've been struggling with an idea lately and was wondering if anybody could shed some light on it. It seems simple but i don't think the answer is very obvious. The best guestimate for the age of the universe at the moment is 13.5 billion years old. If we could travel back in time 13 billion years and then measured the age of the universe again what would be the answer? Would it be 0.5 billion years old? Thank you.