AdvertisementDid 'Shrooms Send Santa And His Reindeer Flying?December 23, 2010Richard HarrisfacebookEmailThe hallucinogenic mushroom Amanita muscaria. Harvard biologist Donald Pfister claims that both people and reindeer ate the mushrooms. "Reindeers flying -- are they flying, or are your senses telling you they're flying because you're hallucinating?" he says. (flickr)