So-called alternative medicine hasn’t gotten much talk around here, so I thought I’d change that. Let’s talk about homeopathy.
Homeopathy was first proposed in 1796 by German physician Samuel Hahnemann. His idea was to treat patients with diluted solutions of chemicals thought to cause effects similar to the symptoms–for example, a substance thought to cause rashes would be diluted in order to treat hives. “Like with like” is the term homeopathic practitioners use. (See also Sympathetic Magic 
A typical homeopathic treatment is called “30C”. This means that whatever substance has been chosen for the treatment is diluted one drop in 100, 30 times. On the Society of Homeopaths site, in their “What is homeopathy?” section, they say that “30C contains less than 1 part per million of the original substance.” This is a giant understatement. In more precise terms, the ratio is 1 part “stuff” to 100^30 parts water, or 1^60. This is a 1 followed by 60 zeros, so the dilution is 1 part in 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.