[Praxis101]

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Did you know that scientists have absolutely no idea about what causes gravity? None whatsover. I'm not making this up.

Sure, they can model what gravity does in a particular case, but not a clue about why. Does that strike anybody as odd?

It gets even better: scientists don't even have any plausible theories about the mechanism of how gravity operates. You'd think they'd say, "well, it might be a, b or c, but we just don't know yet." But they don't. They apparantly can't even dream up a theory about the mechanism of how gravity works. You probably think I'm joking but I'm not. Look it up.

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When did you assume that scientists knew how/why gravity works?

The only explinations we have, thusfar, are regarding the nature of gravity: what it seems to be like. Relativity was a massive breakthrough, and the answers to your questions will be the next, perhaps. The formulation of string theory depends on these answers currently, and I'm guessing it's the focus of a lot of effort.