In a recent article, Dean Radin, PhD, Chief Scientist of IONS, writes an homage to the legendary Charles Tart, PhD, an influential figure in parapsychology for over 60 years. Tart co-founded the discipline of transpersonal psychology (a branch of psychology that explores the spiritual and transcendent aspects of the human experience), he advanced the idea of post-materialist sciences (a movement that challenges the traditional materialistic paradigm of science), published some 210 journal papers, including influential articles in the esteemed scientific journals Science and Nature, and co-authored 14 books. He is also the person who popularized the term “altered states of consciousness” to characterize the spectrum of consciousness whereby typical everyday awareness is just one specialized form.