Science proves the existence of laws, theories, principles, et al or it disproves the existence of laws, theories, principles, et al. Science is never conclusive because laws, theories, principles, et al are always subject to revision if new data comes along - up to and including refuting the laws, theories, principles, et al.
Some people have said that science can't disprove the existence of something. I say to those people, if science can't really disprove the existence of something, then science can't really prove the existence of something either.
So, we are left with having to accept that practically speaking, science does prove and disprove the existence of laws, theories, principles, et al
or
That everything is taken on faith as nothing can really be proven.
So for the purposes of this discussion, we will assume the former; that practically speaking science does prove and disprove the existence of laws, theories, principles, et al.
Throughout history the concept of authority has been accepted in every society. For instance, John the Baptist, who was recognized as a great prophet in his day - as evidenced by Herod's treatment of John - served as the authority for establishing Jesus as the Messiah. The reason I am mentioning this is that both atheists and Christians should accept the concept of authority and the importance of it as well.
Professor George Wald rightly identifies that we live in a universe where the laws are such that the evolution or creation of intelligent life with a mind like ours seems to be the order of nature, and that the laws are so finely tuned that even minor changes would produce different results. Mind you science still does not know how life made the leap from non-living matter to life, Wald is saying that after the leap was made, given our conditions and physical laws, intelligent life with a mind like ours was destined to evolve.
Like every good story we should start at the beginning. Unfortunately for us science can not help us much for the very beginning of Creation. Leon Lederman, American experimental physicist and Nobel Laureate, states it thusly:
"In the very beginning, there was a void, a curious form of vacuum, a nothingness containing no space, no time, no matter, no light, no sound. Yet the laws of in and this curious vacuum held potential. A story logically begins at the beginning, but this story is about the universe and unfortunately there are no data for the very beginnings--none, zero. We don't know anything about the universe until it reaches the mature age of a billion of a trillionth of a second. That is, some very short time after creation in the big bang. When you read or hear anything about the birth of the universe, someone is making it up--we are in the realm of philosophy. Only God knows what happened at the very beginning."
According to Professor Lederman, who is also the Director Emeritus of Fermi National Accelerator Laboratory, the laws of nature were already in place before the very beginning of Creation. While it may be contested that the laws of nature existed before the very beginning, it is uncontested that the laws of nature were in place within a billionth of a trillionth of a second. Therefore, for all practical intents and purposes, the laws of nature have been in place since the very beginning of time and have not changed since then.
Another point that Professor Lederman - who is also the founder and Resident Scholar at the Illinois Mathematics and Science Academy - makes is that before the very beginning "this curious vacuum held potential." For those who wish to know more about Professor lederman, I am attaching a link to his wiki page. Professor Lederman's credentials are quite impressive.
http://en.wikipedia.org/wiki/Leon_M._Lederman
In November of 1919, at the age of 40, Albert Einstein became an overnight celebrity, thanks to a solar eclipse. Eddington’s experiment had confirmed that light rays from distant stars were deflected by the gravity of the sun in just the amount he had predicted in his theory of gravity, general relativity. Since then, general relativity has been reaffirmed in a myriad of other ways.
General relativity was applied to the structure and evolution of the universe as a whole. The leading cosmological theory, called the Big Bang theory, was formulated in 1922 by the Russian mathematician and meteorologist Alexander Friedmann. Friedmann began with Einstein's equations of general relativity and found a solution to those equations in which the universe began in a state of extremely high density and temperature (the so-called Big Bang) and then expanded in time, thinning out and cooling as it did so.
That the universe had a beginning is widely accepted within the scientific community. The Big Bang theory has been independently validated by Hubble and Slipher - who discovered that spiral galaxies were moving away from earth - and the discovery and confirmation of the cosmic microwave background radiation in 1964.
It is widely accepted within the scientific community that the very early universe conditions should have generated matter and antimatter in equal amounts. The inability of matter and antimatter to survive each other should have led to a universe with only a bit of each left as the universe expanded. Yet today's universe holds far more matter than antimatter. For reasons no one yet understands, nature ruled out antimatter.