[Camel Joe]

Perhaps your law was only a theory, Newton’s Law of Gravity once told us we could not fly, but perhaps not...

[Slings and Arrows]

Newton’s Law of Gravity once told us we could not fly

No, it did not.

[KarlInOhio]

Newton’s Law of Gravity once told us we could not fly,

When? Gravity just means that you have to work hard to fly and it took quite a while before the amount of work you could do and the amound you needed to get in to the air matched.

I've heard similar things about people thinking the speed of sound couldn't be broken before Chuck Yeager. Rifle bullets could do it easily, but it took a while to get an engine powerful enough to get the speed and wings strong enough to not snap off the plane. But it was never a physical law.

[Palmetto]

Newton’s Law of Gravity once told us we could not fly, but perhaps not Uhhh...not so much. Newton's Laws are still bound aircraft designers today.

[kevkrom]

Newton’s Law of Gravity once told us we could not fly

Yes we could -- we just had to apply an equal (or greater) force in the opposite direction.