Psychology
Psychology slipped into schools as left-brain/right-brain posters, learning-style quizzes, and tidy stories about how memory works. Some of those ideas were oversold research; others never had strong support. Browse the psychology claims that felt scientific in the classroom and how the field has since tightened up.
What you were taught
What we know now
Research has not consistently found meaningful cognitive decline during pregnancy. Some studies suggest hormonal and organizational changes instead, and much of the "baby brain" reputation appears to be cultural stereotype rather than established neuroscience.
Updated understanding emerged around 2017
What you were taught
What we know now
Brain imaging shows both hemispheres work together for most cognitive functions, and the left/right brain divide is oversimplified.
Updated understanding emerged around 2013
What you were taught
What we know now
It was a common belief throughout history that the full moon influences human behavior.. The term "lunatic" is derived from the Latin word "luna" (moon), and the idea of werewolves and vampires being more active during the full moon is a common folklore. However, there is no scientific evidence to support this claim.
Updated understanding emerged around 1985