Originally Posted by mo42

I would surmise it's the same with most developing sciences, like Quantum Physics (which I only have one semester's background in). Other, more fundamental forces, like gravity, I still don't feel we really understand how it works. And NO ONE has ever given me a straight answer as to how an atom "absorbs" a photon and it causes the electron to "jump up an energy level". I should post that in Tilted Knowledge sometime and see what people's theories are.

There's a crapload of stuff we don't know.