There are some mathematical laws, the rest is still theory:-http://www.livescience.com/50521-wheres-the-proof-in-science-there-is-none.html?cmpid=NL_LS_weekly_2015-04-17- "I think it is best to leave the last word to one of the greatest physicists, Richard Feynman, on what being a scientist is all about:- "I have approximate answers and possible beliefs in different degrees of certainty about different things, but I'm not absolutely sure of anything."