Scientific American ceased to be a reliable source in the mid-1970’s (when I dropped my subscription). Today, they are just another member of the “fake news” media, quoting a certain segment of the liberal party line.
That was what I found when I was first wondering and then found the study plus a Freeper reply included it which I had missed. One word links are not good for me. My mom was a fantastic proof reader, but I tend to be a bit dyslexic. Probably why I didn’t get that job at the post office back in the 70’s. :)