The material universe must be caused, and it cannot be the cause of its own existence.
Some scientists respond, “Well, there must be an enormous number of universes and each one is a little different. This one just happened to turn out right.”
In 1927, Belgian astronomer Georges Lemaître theorized that the universe began with a single explosion from a densely compacted state.
Certain subjects, all posing ultimate questions, reduce much of scientific talk to pablum. Why do you think that is?
Science writer Dennis Overbye calls the inflation controversy a crisis in cosmology. But maybe it is more of a crossroads.