This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American In 2015, doctors in Germany reported the ...

A serial rapist's attempt to claim insanity based on multiple personality disorder fell flat in Texas, as a judge ordered the expert's trial testimony stricken from the record as junk science.

I once met a man who believed he had another person, a soul, living inside of him. It brought him comfort—a psychological construct. I didn’t take it literally, but I took it seriously. I once ...