Trepanning. I’ve heard rumors that this reduces CSF pressure on the brain allowing it to expand a bit and increase intelligence. It was once common practice among many ancient cultures, but that doesn’t prove they had good reasons. I find the supposed effect and proposed mechanism of action highly dubious, and, of course, brain damage/infection may well kill you if done improperly, but you asked for “risky” and “wacky”.
Trepanning. I’ve heard rumors that this reduces CSF pressure on the brain allowing it to expand a bit and increase intelligence. It was once common practice among many ancient cultures, but that doesn’t prove they had good reasons. I find the supposed effect and proposed mechanism of action highly dubious, and, of course, brain damage/infection may well kill you if done improperly, but you asked for “risky” and “wacky”.