There is no credible scientific challenge to the idea that all living things evolved from common ancestors, that evolution on earth has been going on for billions of years and that evolution can be and has been tested and confirmed by the methods of science. But in a 2001 survey, the National Science Foundation found that only 53 percent of Americans agreed with the statement "human beings, as we know them, developed from earlier species of animals."
And this was good news to the foundation. It was the first time one of its regular surveys showed a majority of Americans had accepted the idea. According to the foundation report, polls consistently show that a plurality of Americans believe that God created humans in their present form about 10,000 years ago, and about two-thirds believe that this belief should be taught along with evolution in public schools.
http://www.nytimes.com/2005/02/01/science/01evo.html?pagewanted=2&ei=5094&en=143526089b4b8af2&hp&ex=1107320400&partner=homepage