How does a cosmos without a bearded, bathrobed God in the sky pull off all the things that a bearded, bathrobed guy in the sky was supposed to have pulled off? If there was no God who said 'Let there be light,' where did we get all that light?
In the two million years during which we climbed from stone-tool-wielding Homo erectus with sloping brows to high-foreheaded Homo urbanis - man, the inventor of the city - we underwent 60 glaciations, 60 ice ages.
