NUKE: To make my point simple: science cannot explain how all the matter in the universe was created. If science states that all matter simply created itself, it is just as plausible to state that God created it.
There may be a good reason why science will never be able to "explain" the origin of universe or a few other things I could think of.
Human mind is just not able to comprehend things beyong a pretty narrow range - we do not have symbols and concepts to express that knowlege.
In that sentense you have used several deep concepts that developed in human mind to reflect the reality with which our ancestors were faced - which has very little to do with the more general picture of the universe.
"Created"and "always" presumes the concept of time - something coming into existance that did not exist before in time. Also space - created where?
Time is a feature of the Universe and so is space. They both must have originated along with the Universe. So we cannot use those concepts to express conditions associated with its creation.
And so on.
By God we assume a being with intent - hence mind. But it is obvious that such mind would have beed vastly different than our mind. We would not be able to recognise it as mind if we encountered it, so we project and assume that God would be like us but with more memory, processing power, etc. That's not the case.
Obviously if God created the Universe with its time and space, He must be "outside" time and space. We will never be able to imagine, let alone discuss how a mind "outside" time and space woule operate. How does one think of cause and consequence without time? If not, how can we make a statement that God caused the Universe to exist?
Etc., etc... We just cannot understand because we are not equipped to. Science is great in describing its own limitations. The science of mind gives a good idea of what limitations of the mind are - including what kind of science the mind could do.
miko