Exploration of the pineal gland goes back centuries, long before science started trying to explain what it is and what it does. The tiny part of the brain is extremely interesting but one must be cautious about their research as it can take people down the dangerous roads of pseudoscience and false spirituality.
Dr. Dietrich Klinghardt has done a great deal of research on the topic and has found reasons to believe the pineal gland is under attack in western society through chemicals and frequencies.