Kabbalah: Jewish mystical tradition based on Old Testament revelation.
Kap Dwa: A 12-foot tall two-headed giant, allegedly captured by Spanish sailors in 1673.
karma: In Hinduism and Buddhism, a fundamental concept that a person's thoughts and deeds determine the consequences of their afterlife and rebirth.
Kaysing, Bill (1922–2005): Investigator of space-related topics, most notably, the theory that NASA faked the Apollo moon landings.
kundalini: The energy of human consciousness which is normally dormant, lying near the root chakra at the base of the spine.
Kirlian photography: Named after Seymon Kirlian, a controversial technique to photograph a person's aura or biofield.