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Edgar Cayce (1877–1945) was a famous channeller responsible for a lot of woo popular in today's New Age. His channeled writings include prophecies of catastrophic earth changes, involving the Earth's axis shifting, California falling into the ocean, and earthquakes.
California just called, says it's still here, thank you.
 A woo-meister of note
He was known as the "sleeping prophet" because he would allegedly slip into a deep meditative sleep in order to give his predictions. He also founded Atlantic University, a diploma mill for all sorts of wonderful degrees in bullshit.
He also popularised the myth about a buried "Hall of Records" lying between the paws of the Sphinx, which allowed Egypt-woo-ologists like Graham Hancock and Robert Bauval to publish wildly popular books of gibberish. He also apparently had something to do with Lemuria and was largely responsible for perpetuating many of the myths surrounding Atlantis in modern popular culture, including the myth that Atlantis held some sort of "Great Crystal" that was destroyed by a death ray.
His laundry list of woo also included the recommendation of many quack medical remedies (along with promoting osteopathy), such as poultices of castor oil, and "atomidine", which is a patent medicine consisting of an iodine trichloride (I2Cl6) solution prepared by running electricity through it. The claim is that this process makes the ordinarily highly toxic iodine trichloride safe for human use while giving it benefits to the immune system by cleansing the glands and lymphatic system, but this is just silly. In reality it is "mostly harmless" only because atomidine contains only 1% iodine trichloride in solution. You can find products based on Cayce's readings, where else, in your local health food store, along with gallons of other woo.
 See also
- Alex Jones who actually sells a Cayce-inspired iodine supplement whose serving size is twice the maximum recommended upper limit
- Vitamin supplement