Fritz Hugh Ludlow became the best-selling author of The Hasheesh Eater in the years before the Civil War. His best-seller related his visionary experiences with

The leading mind behind the mathematics of string theory discusses how geometry explains the universe we see. Illustrations.

Based on a series of lectures that Rabbi Aryeh Kaplan gave to a small group of students in Brooklyn in 1981, this contains transcripts of the series on the Kabb

Inner Space/Outer Space brings together much of the exciting work contributing to a new synthesis of modern physics. Particle physicists, concerned with the "in

A series of mental exercises designed for group participation focuses on the roles of reasoning and imagination in achieving sensory perception