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If you have [trouble / troubled] sleeping at certain times of the month, it could be [because / due] of a full moon. Scientists from the University of Washington say there is a [link / join] between the lunar cycle and sleeping patterns. They say that [in / on] nights when there is a full moon, people could experience more [restless / restful] sleep. The reason for this could be the Moon's changing [bright / brightness] . When there is a full moon, the extra brightness in the night sky could interrupt [our / my] sleep. The scientists said: "Moonlight is so bright to the human [eye / see] that it is entirely reasonable to imagine that, in the [absence / absent] of other sources of light, this source of nocturnal light could have had a [roll / role] in changing human nocturnal activity and sleep."

The scientists [conduct / conducted] a study of the sleep patterns of over 500 people. Each person wore a special wristband that [tricked / tracked] their sleep. The study included 98 people from an [isolate / isolated] village in rural Argentina. These people did not have [access / excess] to electricity and other artificial light [sources / sauces] . Their sleep patterns were [compared / comparison] to 464 people living in U.S. city of Seattle, which has lots of artificial [lights / light] pollution. The scientists discovered that people in the rural village and in the big city got [less / fewer] sleep on the nights leading up to the full moon. The scientists said the artificial light in cities does not [seem / seen] to affect sleeping patterns and that, "human sleep is synchronised with lunar [phrases / phases] ."