It is a pretty out there theory, but at one point the universe would have cooled enough from the very hot big bang origins to allow liquid water to exist everyw

It is a pretty out there theory, but at one point the universe would have cooled enough from the very hot big bang origins to allow liquid water to exist everywhere, but not cooled sufficiently to cause everything to freeze. If any rocky planets existed at the time, maybe that was the origin of life which was much more able to spread widely due to the small size of the early universe. https://arxiv.org/abs/1312.0613 https://arxiv.org/abs/1312.0613