What is marvelous, amazing, about nature is that it was here before us and will be here long after we are gone. In the meanwhile we sit around the campfire and entertain ourselves with stories.

The following selections from a recent popular book on cosmology, Endless Universe: Beyond the Big Bang by Paul J. Steinhardt and Neil Turok, would make for good reading at a campsite under a dark, star-filled desert night sky:

Cosmology, the study of the origin and evolution of the universe, has some unique limitations that call for a high degree of caution. Scientists cannot perform direct experiments on the universe, and they cannot travel back in time. The best they can do is gather indirect information about the history of the universe through painstaking observations of distant objects that emitted their light a long time ago and try to piece together a logical account. But the evidence is uneven, with highly detailed information about some epochs and little or no information about others. Even if one story fits all the available evidence well, there is always the possibility that another story might fit just as well, or better (7-8).

The history of the universe can be compared to a play in which the actors–matter and radiation, stars and galaxies–dance across the cosmic stage according to a script set by the laws of physics. The challenge for the cosmologist is to figure out the story line after arriving at the show 14 billion years too late, long past the crucial opening scenes (18).

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