circadian rhythms

Want to lower your risk of cardiovascular disease? Adjust when you go to sleep.
Nix these things and get better z’s, guaranteed.
Disruptions of the biological clock has been linked to the development of certain cancers.
The implications for city-dwelling humans aren't great either.
Understanding this process could be a first step toward better treatment for insomnia and jet lag.
Your ancestors probably woke up in the middle of the night. So why does it seem like a big deal when it happens today?
There's a peak period to do just about everything, and here's why.