A quote from Astronomer Martin Rees
“Cosmological ideas are no longer any more fragile and evanescent than our theories about the history of our Earth. Geologists infer that the continents are drifting . . .We also believe at least in outline the story of how our biosphere emerged and we humans evolved ..The empirical support for a Big Bang ten to fifteen billion years ago is as compelling as the evidence that geologists offer on our Earth’s history”
( Just Six Numbers [New York: Basic Books, 2000], 10).