Science is evolutive, of course, human doesn\'t have all the tools to explain everything right now. That\'s the cool thing in evoluting: the next day, we\'ll know a bit more than the previous one until one question is solved.
Now, don\'t say \"eh witches or other occult things exist, they\'ll rule the world!\"
Can\'t you see it\'s a typical human creation to make people dream or fear... (that\'s used in lot of things).
Actually, the \"magic\" that have been tested in a lab has always been proven wrong (we would know since there\'s a large reward for true \"magic\")
Now some people have some special talent that science couldn\'t explain now, like some healer. But even in that case, it\'s more and more understable.
I think too the science can not see everything too. We can\'t explain everything since after all, we perhaps simply lack the sense to understand or measure something...
(no witch has been harmed in this post)