There are more than thirty such parameters that must have almost the precise values that they do in order to permit a universe with life. The odds of that happening have been calculated to be ten to the negative 230—that is to say, one chance in a number that has 229 zeros after it. Randomly finding a specific grain of sand on the first try among all the grains on earth would be millions of millions of times more likely than the universe existing. And yet here we are.
