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I am just wondering, when we talk about fundamental forces we refer to the strong force, electromagnetism, the weak force and gravity. But is it not true that gravity is just the curvature of the space time fabric, in which case it is technically not a force. So when we say gravity is a fundamental force, what are we actually talking about?

If gravity is just the curvature of space-time, then when we talk about gravity as being quantized (gravity at the quantum-mechanical level), are we talking about the fabric of space and time at a quantum level?

Also, just curious

Whats the go with inflation, when the universe expanded faster than the speed of light, could anyone explain to me how that is possible?

Thanks