American IQ test scores have dropped during a recent 13-year period, a remarkable finding that runs counter to the well-established trend of increasing IQ scores throughout much of the 20th century.

A version of this essay first appeared in Jess Steier’s newsletter, “Unbiased Science.” Fluoride is having a rough day in the court of public opinion. The National Toxicology Program (NTP), part of ...

High schoolers with higher IQs are significantly more likely to be moderate or heavy drinkers as adults, according to a new study from UT Southwestern Medical Center. jovannig - stock.adobe.com High ...

Communities started adding fluoride to the water supply in 1945. But now, a new analysis finding a potential link between added fluoride and lower IQs in children is causing concern. The National ...

Is America getting dumber? That’s the burning question after a new study reveals a troubling trend: American IQ scores have ...

Remember when you were in school, an organization would come in to teach an anti-drug program? If you went to school in the ’80s and ’90s (way back in the 1900s, as our kids now say), you probably ...

Long COVID can reduce a person’s IQ by up to six points, worrying research has revealed. A report in the New England Journal of Medicine found that COVID-19 was “associated with longer-term ...