This week we look at psychedelics, and what role altered states of consciousness and mystical experiences play in human evolution. Are they still worthy of scientific study today?

On this edition of the podcast, we explore changes in scientific attitudes relating to interpretations of various mysteries of the ancient past.

This week we discuss Vietnam War-era UFO studies carried out by the United States with Australian researcher Paul Dean.

This week we talk with writer and broadcaster Greg Bishop, former publisher of "The Excluded Middle" and all-around unique thinker.

This week on the podcast we explore the ancient wonders of North American archaeology, such as Ohio's Serpent Mound and other enigmatic locations.

This week's podcast examines several mysteries of modern mathematics, which some think might point to inherent order in the universe or even a "source code" behind reality.

This week's podcast examines the myth and folklore surrounding owls and the prevalence of these birds of prey in a number of traditions around the world dating back to antiquity.

On this edition of the podcast, we look at Phobos, one of Mars's most unusual moons, and the long history of unusual phenomena associated with it.

On this edition of the podcast, we are joined by Paul Kimball, co-star and producer of the Canadian television program Haunted.

This week on the podcast, we discuss scientists who hope to finally unravel the mystery of Loch Ness, and why some question whether Sirhan Sirhan killed Robert Kennedy in 1968... including Kennedy's own son.