A bit technical, but so cool. Almost all your cells have clock mechanism in it. No Swiss radars of course. But proteins that regulate the behavior of the cell over the day. A biochemical horn blows from parts of the brain that react to light and darkness. A few proteins get together in the cell’s nucleus. They lead thousands of genes to transcribe to proteins. That wakes up the cell. And makes you feel hungry. Or open your eyes.
Veronique Greenwood (Wired) - How the body’s trillions of clocks keep time
