How the Moon Messes With Your Sleep

Thus should all great science be done, since as it turned out, the second look revealed intriguing patterns. On average, the subjects in the study took five minutes longer to fall asleep on the three or four nights surrounding a full moon and they slept for 20 fewer minutes. In addition, EEG activity related to deep sleep fell 30%, melatonin levels were lower and the subjects reported feeling less refreshed the next day than on other days. The subjects slept in a completely darkened lab with no sight of the moon, and none of them—at least from what was known—appeared to have given any thought at all to lunar cycles. And since the moon was not an experimental variable in the original study, it was never mentioned either to the subjects or even among the investigators.