"Homeopathy was invented around 1796 by a doctor named Samuel Hahnemann. He believed that homeopathic medicines become more effective the more they are diluted. Homeopathic solutions are often so literally watered-down that they don't contain a single molecule of the original medicine or substance: the patient is drinking nothing but water. Homeopathic medicines have not been shown to work better than real medicines, in fact they have been shown to be exactly as effective as placebo. Yet many people use and endorse homeopathy."