AM. His last appearance on the show was the Sunday March 23, 2014 episode. On December 16, 2012, April 17, 2017, and June 21, 2018, McKenna was the guest on The Joe Rogan Experience podcast. Dennis was also a key guest on The Cosmic Echo Podcast on September 18th, 2018. Bibliography The Incense Bible: Plant Scents That Transcend World Culture, Medicine, and Spirituality (2007) The Brotherhood of the Screaming Abyss (2012) Aya Awakenings: A Shamanic Odyssey (2013) Return to the Brain of Eden: Restoring the Connection between Neurochemistry and Consciousness (2014) References External links Biography and publications list at Heffter Research Institute Erowid's Dennis McKenna Vault 2009 – Cognition Factor (2009) 1950 births Living people British Columbia Institute of Technology faculty Psychedelic drug researchers American psychedelic drug advocates Ethnobotanists 20th-century American writers 21st-century American writers People from Paonia, Colorado