The pineal gland in the brain has sometimes been termed the "third eye": https://en.wikipedia.org/wiki/Pineal_gland#Society_and_culture https://en.wikipedia.or

The pineal gland in the brain has sometimes been termed the "third eye": https://en.wikipedia.org/wiki/Pineal_gland#Society_and_culture https://en.wikipedia.org/wiki/Pineal_gland#Society_and_cultu...