Some 15 billion years ago, a titanic explosion is said to have created space and time and started the universe on its epic journey. Out of one primordial speck ... » 

Some 15 billion years ago, a titanic explosion is said to have created space and time and started the universe on its epic journey. Out of one primordial speck came hundreds of billions of galaxies; and in one of these galaxies, on a nondescript planet, there emerged human beings. «