Thought everyone might dig this article-"The Pineal Gland, LSD, and Serotonin" It seems the ancient Chin3se had advanced knowledge of the Pineal Gland (epiphysis). There is a Lizard that has one protruding from a slit on the top of it's head and there is a lamprey which has 2 pineal glands.

Here's an excerpt:

"Question: Will you please give me the exact position of the original cavity of the spirit?

Answer: It is (in the center of the brain behind) the spot between the eyes. Lao Tzu called it 'the gateway to heaven and earth'; hence he urged people to concentrate on the center in order to realize the oneness (of all things). In this center is a pearl of the size of a grain of rice, which is the center between heaven and earth in the human body (i.e., the microcosm); it is the cavity of prenatal vitality. To know where it lies is not enough, for it does not include the wondrous light of (essential) nature which is symbolized by a circle which fatherly Confucius called virtuous perfection (jen); the Book of Change (I Ching) calls it the ultimateless (wu chi), the Buddha perfect knowledge (yuan ming) and the Taoists, the elixir of immortality or spiritual light; which all point to the prenatal One True Vitality. He who knows this cavity can prepare the elixir of immortality. Hence it is said: 'When the One is attained, all problems are solved.'

Therefore, during the training both eyes should turn inward to the center (between and behind them) in order to hold on to this One which be held in the original cavity of spirit (tsu ch'iao) with neither strain nor relaxation; this is called fixing spirit in the original cavity which should be where (essential) nature is cultivated and the root from which (eternal) life emerges." [34]

The above is a translation from a very ancient Chinese dialog between master and student, a conversation which illustrates there were and are some who have put the knowledge of the pineal gland to beneficial use by concentrating upon its general location which we have described in quite some detail. Those who also use this information will be directly altering their biochemical balance for the better.

I will go one further step in speculative ideology. It is my assumption there is a LIGHT which penetrates even the deepest of neural tissue. I believe this has a direct effect on the physiology of the pineal gland which in turn affects the organism as a whole. "

Here's the link: http://taolodge.com/pineal.html