Stephen Hawking Quote
If the rate of expansion one second after the Big Bang had been smaller by even one part in a hundred thousand million million, it would have recollapsed before it reached its present size. On the other hand, if it had been greater by a part in a million, the universe would have expanded too rapidly for stars and planets to form.
The Nature of Space and Time (ed. Princeton University Press, 2000) - ISBN: 9780691050843