Aye, at the base level of the idea that organisms vary through time, evolution is fact (according to some). The neo-Darwinian takes on this are theories. Theories are open to question and refinement, but I'm not sure how a fact is also a theory unless the terms of debate altogether are inadequate.

Mrs. Darwin

Went to the Zoo.
I said to Him-
Something about that Chimpanzee over there
reminds me of you.