🧪 Humanity dumbing down for the past ~50 years… scienceblog.com/t-a-study-of...
A study of 730,000 Norwegian conscripts found the IQ gains of the 20th century reversed after 1975, falling by roughly seven points a generation, and ruled out genetics as the cause by comparing broth...
A massive study of Norwegian conscripts reveals that IQ scores, which climbed steadily for a century, have been falling sharply since the 1970s—and the culprit isn't in our genes.
scienceblog.com