What I just learned about gravity

[Benman]

I'm a fairly educated person, but not a scientist by any stretch. I don't understand relativity, but I know that it explains the effect of gravity on light, and that prior theories explain the basic effects of gravity very accurately. After looking around on the Internet today, however, I as amazed to read that no one has any idea how gravity actually operates, or what it is. Is this right? How can this be? I'm kinda blown away that such a ubiquitous concept is actually a complete mystery.