Tag

Electric Lighting
by Elise McGlashan, PhD & Parisa Vidafar, PhD on November 5, 2019 in Clocks in the Spotlight Image credit: Olivia Walch (Twitter: @OliviaWalch; website: www.oliviawalch.com)  Humans evolved in an environment with only very bright (sun) or very dim (moon or fire) sources of light. Today, artificial lighting enables us to spend hours per day at intermediate light levels. Our recent study shows...
Read More
PNAS June 11, 2019 116 (24) 12019-12024; first published May 28, 2019 https://doi.org/10.1073/pnas.1901824116 Significance: Electric lighting has fundamentally altered how the human circadian clock synchronizes to the day/night cycle. Exposure to light after dusk is pervasive in the modern world. We examined group-level sensitivity of the circadian system to evening light and the degree to which sensitivity varies between individuals. We...
Read More