Update: TED have pulled Graham Hancock's talk for being 'unscientific'. You can read more details about the this controversy here on TDG.
Our good friend Graham Hancock, author of best-selling books on historical mysteries including The Sign and the Seal, Fingerprints of the Gods and Supernatural, recently gave a TEDx Talk in which he discusses his exploration of the South American shamanic brew ayahuasca, and its impact upon his life:
Graham Hancock tells the story of how his 24-year relationship with cannabis was brought to an abrupt halt in 2011 after an encounter with ayahuasca, the sacred visionary brew of the Amazon. Along the way he explores the mystery of death, the problem of consciousness, and the implications for the human future of a society that wages total war on true cognitive liberty.