Tomorrow's Katz Tales column in the print version of the Malaysian national daily, The Star Weekend section is a bit different from usual. Encouraged by Facebook pal Mathew Titus, I'm looking into the circadian rhythms of cats.
More about the theory on Tuesday. In the meantime, here are some of my resources:
Biological Clocks A description of circadian rhythms in plants by de Mairan, Linnaeus, and Darwin
Genetic switch for circadian rhythms discovered, University of California, Irvine, December 12, 2007.
For info about the Earth's ever-changing day: Wikipedia 1 and Wikipedia 2.
Domestic cats show episodic variation in plasma concentrations of adrenocorticotropin, alpha-melanocyte-stimulating hormone (alpha-MSH), cortisol and thyroxine with circadian variation in plasma alpha-MSH concentrations
A Circadian Rhythm Of Norepinephrine Regionally In Cat Brain: Its Relationship To Environmental Lighting And To Regional Diurnal Variations In Brain Serotonin