What did the world sound like when it came into being, I once asked a class of first graders? Many raised their eyes to the sky as if trying to remember that sound and then, one by one, without the self-consciousness that afflicts those who are much older, began to offer their answers. A bang?–one said. A clang?—another one added. A bzzzzzzzzzzzzzzzzz?–still another offered.
I then played them a recording someone at Harvard had made of a simulation of the Big Bang and watched as…Continue