The Great Lakes region in the United States experienced an unprecedented lack of sunlight that winter, leaving millions of residents under gloomy skies for weeks on end, as reported by the Guardian. The decline in ice cover on the Great lakes has been ongoing for decades, with only 0.4% observed on Jan. 1 this year, the lowest since records began in 1973. Seasonal Affective Disorder (SAD) affects approximately 5% of American adults.