 It's one of those numbers that's just hard to really conceive. That's just such a massive amount of time, right? So it's one of the things that I think is fascinating about the idea of extraterrestrial life because life could have come and gone in other places in the universe many times in that era, right? 13 billion years. What if life formed 5 billion years in, lasted for 3 billion years, and that's before we ever got here?