I’ll just put this here.
(Click on the image to get the full size version.)
You decide what to make of it!
Circadian Rhythm diagram partially based on:
Work was done with Inkscape by YassineMrabet and published at Wikipedia: http://en.wikipedia.org/wiki/File:Biological_clock_human.svg . Information was provided from “The Body Clock Guide to Better Health” by Michael Smolensky and Lynne Lamberg; Henry Holt and Company, Publishers (2000). Original illustration was published under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.