[ShannonAlther]

> The law of gravity is one example, since nobody knows where gravity actually comes from.

Please stop this. While I agree with your overall point, we know what causes gravity (the uneven curvature of space due to the distribution of mass). You can find this out by googling "what causes gravity". It's not a mystery anymore.

[newen]

That is just the mathematical description of gravity according to general relativity. We don't have a theory for how the uneven curvature of space happens and we don't have a quantum mechanical theory for gravity either (gravitons are hypothetical, not proven).

[ShannonAlther]

You are right, but my point is that general relativity gives us enough of a causal model for gravity that throwing up our hands and saying "It's a mystery" is unacceptable.