Of course. It's hard to pinpoint exactly what is a priori in intuition, but one man's junkpile is another man's goldmine. Pick an example. At one time electric attraction was action at a distance. Then one man--no math!--saw electric fields and now we all see electric fields. What is a priori there?
I've often wondered about what Tesla was smoking when he came up with the most amazing inventions and innovations of his era...his claims of having invented a directed energy beam for example(the secrets of which seem to be lost or suppressed, more likely)....
I like what Proverbs says when it says "There is nothing new under the sun." Knowledge always seems to be uncovered and rediscovered...necessity being the birthing mother of invention.
I think what lies just beyond science is a vast reservoir of knowledge and wisdom (and I don't mean new agism or weird earth shamanistic crap) that science in its current closed method of inquiry has lost the ability to tap. For example...the dreams of two brothers who owned a bicycle shop in Ohio, wishing to fly....