All the hydrogen atoms in the universe are formed now - including
all the ones in your body. If the universe had remained
this hot and dense for much longer, the hydrogen would all have
been cooked into other chemical elements. Without hydrogen,
there would be no water, and therefore no life as we know it. We
understand the aftermath of the Big Bang very well.
Scale of window: 330 trillion miles across.
Weight in this volume: 10 billion trillion trillion