Trillions of years into the future, when all stars are gone...all parts of the cosmos will cool to the same temperature as the ever-cooling background. At that time, space travel will no longer provide refuge because even Hell will have frozen over. We may then declare that the universe has died-not with a bang, but with a whimper.

The Sky Is Not the Limit: Adventures of an Urban Astrophysicist (ed. Prometheus Books, 2010) - ISBN: 9781616141202