Imagine waking up after a brain injury and suddenly speaking in a language you never believed you knew.
Cases like these sound almost supernatural—but they raise fascinating questions about memory, language, and what the brain may store beneath conscious awareness.
Are people truly speaking an unfamiliar language, recovering words heard long ago, or producing sounds that only resemble one?
In this clip, we explore the science and mystery behind this rare neurological phenomenon—and how much we still don’t understand about the human brain.
