Here is another good example of how stupid some of these studies are
Moon Phases Tied to Sleep Cycles
But now Swiss researchers have found evidence that the lunar cycle may affect sleep patterns. They found the connection by testing 33 healthy men and women, ages 20 to 74, in a sleep laboratory, and correlating the data with the moonâ€™s phases. The study appears in the Aug. 5 issue of Current Biology.
Melatonin levels, total sleep time and delta sleep time (the deepest sleep, as recorded by EEG) reached their lowest levels at full moon, and their highest as the moon waxed and waned. The average time it took to fall asleep and the time to arrive at REM sleep (the type of sleep in which dreams occur) followed the opposite pattern, longest at the full moon and shorter as it waxed and waned.
33 people is what they look at give me a break that not enough to tell anything.