The second theory would explain why so little damage was done.

If this is true, no single theory can explain the function of the system as a whole.

The theory didn't explain where the solar system came from.

I have (as always) a theory to explain all this bad service.

They'd had the theory explained to them carefully and it worked.

They are and any theory of species origins must explain why.

His theory doesn't explain why any thing exists at all, including physical laws.

He or she will also ask whether another theory could explain the puzzling new evidence.

No theory exists, or was offered, to explain the blue light.

The theory also explains how the gas system responds to change.