Dennis McKenna on the Co-Evolution of Plants and Humans Derrick Broze April 13, 2015 4111 Listen to Text Below Derrick Broze interviews American ethnopharmacologist, research pharmacognosist, lecturer and author Dennis J. McKenna, PH.D at the Free Your Mind Conference 2015 in Philadelphia. Find more videos like this at: www.theconsciousresistance.com Leave a ReplyYour email address will not be published.CommentName* Email* Website Math Captcha − 4 = 5 Notify me of follow-up comments by email. Notify me of new posts by email. Δ