- Bailey, M.J., et al. "Night/Day Changes in Pineal Expression of >600 Genes." Journal of Biological Chemistry (December 22, 2008).
- Brain model, clock (AMNH)
- Illustration (From René Descartes' De Homine, 1662)
This Human Bulletin was made possible by Science Education Partnership Award (SEPA) grant #1 R25 RR025057-01 from the National Center for Research Resources (NCRR), a component of the National Institutes of Health (NIH).