UW News

Horacio de la Iglesia


January 27, 2021

On nights before a full moon, people go to bed later and sleep less, study shows

picture of the moon

Sleep cycles in people oscillate during the 29.5-day lunar cycle: In the days leading up to a full moon, people go to sleep later in the evening and sleep for shorter periods of time. The team, led by researchers at the University of Washington, observed these variations in both the time of sleep onset and the duration of sleep in urban and rural settings — from Indigenous communities in northern Argentina to college students in Seattle, a city of more than 750,000. They saw the oscillations regardless of an individual’s access to electricity, though the variations are less pronounced in individuals living in urban environments.


June 25, 2020

Sleep improving for university students under stay-at-home orders

an alarm clock at night

In a study published June 10 in Current Biology, a team from the University of Colorado Boulder and the University of Washington reports that a group of students at CU Boulder generally got more sleep after widespread stay-at-home orders and social distancing guidelines were put into place in mid-March.


December 12, 2018

Teens get more sleep, show improved grades and attendance with later school start time, researchers find

In 2016, Seattle Public Schools pushed back the start times for the district’s 18 high schools by 55 minutes, from 7:50 a.m. to 8:45 a.m. And as hoped, teenagers used the extra time to sleep in.


June 19, 2015

Access to electricity is linked to reduced sleep

A Toba/Qom child sleeps.

New research comparing traditional hunter-gatherer living conditions to a more modern setting shows that access to artificial light and electricity has shortened the amount of sleep humans get each night.