Posthuman Blues

Tweaking the Past

Paul Davies opines that the universe might be able to tweak its essential parameters through a different kind of retrocausality. The thinking goes like this: If the laws of physics reside within the physical universe, they can only be as precise as the information content of the universe itself. But that content was smaller just after the Big Bang, perhaps offering an imprecision that later observers could influence. In other words, the universe is exquisitely shaped to produce life because life made it so.