Sources used in this video:
Nature.com: What do halllucinations tell us
NPR.Org: Oliver Sacks, Exploring How Hallucinations Happen
Psychcentral.com: Learning to Live with Charles Bonnet Syndrome
The Sounds of a Mystery
U.S. National Library of Medicine: Hallucinations
Livescience.com: Hearing Voices: Some People Like It
Huffington Post: High Coffee Intake May Cause Auditory Hallucinations
National Geographic: Coffee May Cause Hallucinations
TED: Oliver Sacks: What hallucination reveals about our minds
Genealogy of Religion: Encultured Hallucinations
Livescience.com: How Do Hallucinogens Work?
Science Magazine: Caffeine Linked to Hallucinations
The Atlantic: Seeing God in the Third Millennium
The Guardian: Why does LSD make you hallucinate?
Scientific American: How Hallucinogens Play Their Mind-Bending Games
Livescience.com: Out-of-Body Hallucinations Linked to Brain Glitch
Psyciatric Times: Auditory Hallucinations in Psychiatric Illness: Page 3 of 3
New York Times: A Pungent Life: The Smells in My Head
U.S. National Library of Medicine: The Neurophysiology of Auditory Hallucinations – A Historical and Contemporary Review
Other drug related episodes you should check out are SciShow on the dangers of synthetic marijuana and the most horrible drug in the world, Hallucinogens as Medicine, How Weed Works: THC and What is Salvia?