"There is far more evidence supporting the theory of evolution (and indeed it is a scientific theory) than gravitational theory.
Do you deny that gravity exists?"
Not to get off subject, but our lack of knowledge concerning gravity (and time for that matter) has always irked me. Shouldn't we know the MOST about the simpler things, and worry about the more complex later?
I mean, I have yet to hear a good explanation for particle/wave duality and if we don't even know what we're made of- sheeesh Why worry about DNA if you can't even agree on a good definition for light/energy or something "simple" like a dimension.
Sorry to rant, but it seems to me the universe is WAY more complex than anyone gives credit. Space is complex. Time is complex. Energy is a mystery. We are like children who have just enough smarts to take the safety off our dad's gun.
What makes you think gravity is simple?
Particle energy = Planck's constant x wavelength. You want a simpler explanation, but that is as simple an explanation as there is, a single equation relating two variables by one constant. It is an observed fact, and a whole lot simpler than an apple falling on your head due to the hypothesized force of gravity.
Your problem is that you confound every day experience with simple. But, unless you squint your eyes and observe the diffraction through the slits of your eyes, wave-particle duality is not a part of your daily experience. In a laboratory it could be. Most everyday phenomenon are, in fact, far more complex. Wave particle duality only doesn't matter in those cases where there are so many waves interfering with each other that that wave interference effects all wash out and all you see is the gross features of the classical everyday world.
It is not wave particle duality that science has a hard time with, but trying to explain classical physics and the lack of time reversal asymmetry associated with the tangible world.