The Enneagram, like many personality tests, isn't well backed-up by scientific research, but its popularity in spite of that can give us a window into how the human mind works.

Settle in for a smörgåsbord of brain facts.

SciShow explains how some great, Nobel-winning research into the human brain turned into a meme of misunderstanding that lasted for decades.

In 1942, a mother-daughter duo named Katharine Cook Briggs and Isabel Briggs Myers developed a questionnaire that classified people's personalities into 16 types. Called the Myers-Briggs Type Indicator, or MBTI, it would go on to become...

It's difficult to understate the affect that other people's perceptions have on the kind of person you end up being. Of course, we also have tendencies and traits that are built into us, but mostly I think our selves are constructed out...