I have a question. As already mentioned the measurments tell us the universe is flat or nearly flat. It was also stated that only closed universe would be spatialy finite and both the open and flat one would be infinite. My question is: How can universe have a beginning and is spatialy infinite? It is widely accepted that our universe has a beginning so wouldn't that suggest that our universe is either closed or that flat/open universe doesn't have to be infinite, somehow? =)
Please, tell me if I am missing something.