Here is food for thought...
Since the earliest eons of human kind's existence, physicians and scholars were coming up with countless scientific theories which used the presence of wind as their foundation for postulating further theories. After all, everyone "KNEW" that wind existed, right? Just watch the swaying of trees, the rustling of leaves...
Yet it was only MANY millenia later in the 1600's that humans were able to SCIENTIFICALLY PROVE the existence of wind .... by using the Barometer which measured differences in atmospheric pressure.
But was there ever a doubt in any person's mind that Wind existed before then? Proof or no proof? NO.
Makes you think, doesn't it?