How Our Phones Messed With the Menstrual Cycle’s Link to the Moon

How Our Phones Messed With the Menstrual Cycle’s Link to the Moon

For centuries, people speculated about a link between the menstrual cycle and the phases of the moon. A new study in Science Advances shows that the connection held until about 2010, the year smartphones and LED bulbs became part of everyday life. Researchers at Julius-Maximilians University of Würzburg analyzed records from 176 women across nearly a century. They compared handwritten logs from the mid-20th century with digital app entries from …