Brad malt says, how is it possible that we were able to observe the cosmic micre wave background? It has had 13 point four billion years to travel to us. But with the expansion of space, aren't we more than 13 point 4 billion light years away? So there's a simple answer to this, an a complicated answer. The simple answer is, the cosmic micred background doesn't come from some location in space. It comes from everywhere in universe. 380 thousand years after the big bang,. the universe was recombining the electrons and protons were joining back together. There was radiation being given off. And so if you start to trace light cones backward, doesn't matter where