Entrainment of the human circadian clock to the natural light-dark cycle

Natural light exposure shifts the human circadian clock by ~2h within a week.

• 01Design: Prospective cohort — weighted accordingly in our rubric.
• 02Solid design; some limitations on generalizability or duration.
• 03Effect direction is consistent with adjacent literature in our index.

Native comments, Twitter mentions, and Reddit threads about this paper — surfaced together so the conversation isn't fragmented across platforms.