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biorhythms
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Definition:
In the late 19th century a German physician named Wilhelm Fliess (1859 - 1928) developed the idea that human lives are regulated by cycles which are initiated at the moment of birth. Named biorhythms, he originally postulated two but eventually a third was added. They are: physical, emotional and intellectual.

Believers in biorhythms think that by monitoring the flux in their three cycles, they can predict better and worse days for them. The three cycles are 23, 28 and 33 days long (respectively), and when more than one crosses a "node" (zero line), it is thought that a crisis is supposed to ensue.

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Skepticism & Critical Thinking
This is the main index for issues dealing with skepticism, critical thinking, logic and arguments. The first section is Critical Thinking itself - how to think about claims and arguments you hear, how to critique arguments, and how to formulate your own arguments such that they are more likely to be sound and valid. The second section is about Skeptical Investigations - the practical application of the critical thinking skills covered in the first section. Here you will find critiques of things like astrology, alternative medicine, parapsychology, the New Age and more.

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