[sgt101]

People call these thing gravitons but they are particles in the sense that light and electricity are particle based - which is to say that in the limit it turns out that a discrete particle doesn't describe everything that's happening and some wave like properties in space and time are a good fit too. The particles are sort of like a manifestation or a partial mathematical description of the thing that's underneath. The particle is an excitation of a field - all particles are, so mechanical interactions reduce to fields. The thing to remember is that your intuitive and perceptual apparatus was largely evolved to help you get fruit in a forest, and later to help you catch rabbits and shell fish. The ideas that are obvious are approximations that allow you to navigate the world of the past - but they are not "right".