Boston.com: People in the U.S. know more about basic science today than they did two decades ago, good news that researchers say is tempered by an unsettling growth in the belief in pseudoscience such as astrology and visits by extraterrestrial aliens.

In 1988 only about 10 percent knew enough about science to understand reports in major newspapers, a figure that grew to 28 percent by 2005, according to Jon D. Miller, a Michigan State University professor.