Less than half, I'm sure.... Scarey otherwise. Will check my Gallup subscription at work to see if I can find recent polling data.
Photo: Evolution Less Accepted in U.S. Than Other Western Countries, Study Finds
Beliefs of the U.S. public about evolution and creation
and Gallup:
Atheism and the Scientific Community
Oh much more actually. Americans are much more religious/dumb than you suspect. Only Turkey beats us out in this category. It boggles the mind. But makes it much easier to comprehend this morbid fascination with Palin who needs to be treated like a lionfish, (just to keep this on subject before we get tossed into the pub).