<http://schema.org/description>
"Spending just one week exposed only to natural light while camping in the Rocky Mountains was enough to synch the circadian clocks of eight people participating in a University of Colorado Boulder study with the timing of sunrise and sunset."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2013-08-week-worth-synchs-internal-clock.html>