The pineal gland of evolutionarily older animals, such as lizards and amphibians, is also called the 'third' eye. Just like the two seeing eyes, the third eye possesses a lens, cornea, and retina. It is light-sensitive and helps regulate body temperature and skin coloration-two basic survival functions related to environmental light.

The discovery of DMT in the human body stimulated much less fanfare than did that of endorphins. Anti-psychedelic-drug sentiment sweeping the USA at the time actually turned researchers against studying endogenous DMT. The discoverers of endorphins, in contrast, won Nobel Prizes.

Many of us would never have tried psychedelics if it weren't for Leary's popularizing them.

The history of human use of plants, mushrooms, and animals for their psychedelic effects is far older than written history, and probably predates the appearance of the modern human species.

The pineal gland of evolutionarily older animals, such as lizards and amphibians, is also called the 'third' eye. Just like the two seeing eyes, the third eye possesses a lens, cornea, and retina. It is light-sensitive and helps regulate body temperature and skin coloration-two basic survival functions related to environmental light.

Being raised a Jew in southern California in the 1950s and 1960s, my religious training emphasized learning the Hebrew language and Jewish festivals, history, and culture. We also remembered the Holocaust and supported the newly formed Jewish state of Israel.

Aaron was one of the few Jewish volunteers in our study, and I felt a certain kinship with him at that level.