A lot of smart people get scientific facts wrong, and it doesn't mean they are uneducated. In the 1987 documentary "A Private Universe," Harvard students, faculty and alumni were asked what causes the four seasons. Nearly everyone interviewed incorrectly explained that seasons change when the Earth gets closer or farther from the sun in orbit rather than because of the tilt of its axis.
It's also important to remember that in polling, the way a question is phrased can influence the outcome. For example, the National Science Foundation's Indicators report found that fewer than half of Americans agree with the statement, "Human beings, as we know them today, developed from earlier species of animals." However, a 2009 Pew poll reported that six in 10 Americans agree that "humans and other living things have evolved over time due to natural processes." The same year, a Harris Poll reported that while just 29% of Americans agree that "human beings evolved from earlier species," 53% of the same pool of respondents "believe Charles Darwin's theory which states that plants, animals and human beings have evolved over time." In other words, language matters.