Thinking Allowed

Terence McKenna proposes that the 64 hexagrams of the I Ching contain a specific mathematical structure which models both time and the human mind.

Terence McKenna suggests that regardless of their origin and material existence, the chief function of UFOs may be to offset the imbalances in our contemporary culture.

Terence McKenna proposes four key elements of a future mandala: feminism, space exploration, cybernetics and hallucinogens.

Terence McKenna suggests ways in which hallucinogenic plants have been associated with spiritual traditions in ancient India, in the Amazon and in medieval Europe.

Leonard Shlain discusses the introduction of the alphabet and its effects upon the human brain.

In the second part of a conversation with Jeffrey Mishlove, Leonard Shlain discusses the introduction of the alphabet and its effects upon the human brain.