Lunar effect

Common card · No. 480118

The lunar effect is a link between different stages of the 29.5-day lunar cycle and the behavior and physiology of various species, purportedly including humans. The changing phase and position of the Moon in its orbit impacts night lighting and ocean tides on Earth. Various organisms have adapted to this repeating cycle. A considerable number of studies have examined the effect on humans. By the late 1980s, there were at least 40 published studies on the purported lunar-lunacy connection, and at least 20 published studies on the purported lunar-birthrate connection. Literature reviews and metanalyses have found no correlation between the lunar cycle and human biology or behavior. In cases such as the approximately monthly cycle of menstruation in humans (but not other mammals), the coincidence in timing reflects no known lunar influence. The widespread and persistent beliefs about the influence of the Moon may depend on illusory correlation – the perception of an association that does...

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