Here is part of an interesting article from NaturalNews.com:
This study, conducted on mice, showed that mice born in the winter showed a "consistent slowing" of their daytime activity. They were also more susceptible to symptoms that we might call "Seasonal Affective Disorder."
The study was carried out by Professor of Biological Sciences Douglas McMahon, graduate student Chris Ciarleglio, post-doctoral fellow Karen Gamble and two additional undergraduate students, none of whom believe in astrology, apparently. They do, of course, believe in science, which is why all their study findings have been draped in the language of science even though the findings are essentially supporting principles of astrology.
"What is particularly striking about our results is the fact that the imprinting affects both the animal's behavior and the cycling of the neurons in the master biological clock in their brains," said Ciarleglio. This is one of the core principles of astrology: That the position of the planets at the time of your birth (which might be called the "season" of your birth) can actually result in changes in your brain physiology which impact lifelong behavior.