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"The results of more than a century of anthropological research on households, kinship relationships, and families, across cultures and through time, provide no support whatsoever for the view that either civilization or viable social orders depend upon marriage as an exclusively heterosexual institution. Rather, anthropological research supports the conclusion that a vast array of family types, including families built upon same-sex partnerships, can contribute to stable and humane societies.
The Executive Board of the American Anthropological Association strongly opposes a constitutional amendment limiting marriage to heterosexual couples." From the Statement on Marriage and the Family from the American Anthropological Association. February 25, 2004
http://www.aaanet.org/press/ma_stmt_marriage.htm
posted by josep at March 2, 2004 05:14 PM.
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biology behind homosexuality in sheep, study confirms. researchers show brain anatomy, hormone production may be cause male sheep's preference for same-sex partners has biological underpinnings.
A study demonstrates that not only are certain groups of cells different between genders in a part of the sheep brain controlling sexual behavior, but brain anatomy and hormone production may determine whether adult rams prefer other rams over ewes.
Oregon Health & Science University researchers discovered an irregularly shaped, densely packed cluster of nerve cells in the hypothalamus of the sheep brain, which they named the ovine sexually dimorphic nucleus or oSDN because it is a different size in rams than in ewes. The hypothalamus is the part of the brain that controls metabolic activities and reproductive functions.
The oSDN in rams that preferred female was "significantly" larger and contained more neurons than in male-oriented rams and ewes. In addition, the oSDN of the female-oriented rams expressed higher levels of aromatase, a substance that converts testosterone to estradiol so the androgen hormone can facilitate typical male sexual behaviors. Aromatase expression was no different between male-oriented rams and ewes.
The study was the first to demonstrate an association between natural variations in sexual partner preferences and brain structure in nonhuman animals.
http://www.ohsu.edu/news/2004/030504sheep.html
posted by josep at March 8, 2004 06:43 PM.
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