I remember watching an interview with Bill "Spaceman" Lee a long time ago where he was asked what he thought about when he was in a tight situation on the mound and he had to get a guy out. He famously replied, "I think about the cosmic snowball theory. A few million years from now the sun will burn out and lose its gravitational pull. The earth will turn into a giant snowball and be hurled through space. When that happens it won't matter if I get this guy out."

But seriously, what if we could figure out a way out of this universe and worm our way to another one? Science fiction, seemingly. Yet "consistent with the laws of physics and biology."