Some species of spider have short biological clocks that have to be reset each morning. Being out of sync with the 24-hour cycle in this way might help them avoid predators.
An enzyme found in nearly all forms of life runs on a 24-hour clock and dates back to a pivotal moment in evolution
A chemical clock has been found in the brains of mice that keeps track of how long it’s been since an animal last slept, and how sleepy it should feel
The Nobel Assembly at Karolinska Institutet has today decided to award the 2017 Nobel Prize in Physiology or Medicine jointly to Jeffrey C. Hall, Michael Rosbash and Michael W. Young for their discoveries of molecular mechanisms controlling the circadian rhythm