Hume- could it be?

“Fire has always burned, and water suffocated every human creature (Pg. 38).” This is interesting to me. How is it that neither of these constants has ever changed? Or how come we have never changed around them? Hume also talks about gravity and how its is a “universal law”. I just don’t understand. Human have come so far from we were once known as. So much has happened, and were are so much more evolved, intelligent, and able. Human remain changing, and becoming more and more over time, so how come we can’t breathe under water yet? How come we can’t float off of the Earth’s surface if we wanted just by a simple jump up? Why are we not immune to fire in potentially dangerous situations? I mean, so many miracles happen and so many new things are learned and observed each day. Cures are found for diseases, people overcome what might to be an impossible situation, tragedies are overcome, even clones are possible now, right? So haven’t we come to break Earth’s natural laws? Why do these remain so structured and stable? Many things that once were thought to be impossible and could never be done, have been done. We have adapted to things along the way, and gained new abilities. So what makes this so different?...Will it ever be possible to breathe under water? Or go through fire unaffected? Could it be?...Do I sound crazy? lol Hmmm…