Ed Brayton said it perfectly well in his blog “Dispatches from the Culture Wars” when writing about :

Every single scientific theory that are mentioned in the science standards are taught in exactly the same way. They all represent the “reigning theories of the day.” Yet only evolution is complained about. Why? Not because the evidence is any weaker for evolution but because evolution is the one that conflicts with their religious views.

and I could not agree more. The overwhelming evidence in support of evolution come from so many different scientific fields. And yet it is still a falsifiable theory just like every other scientific theory. It is continuously put on test for its validity. And so far it has stand all tests.