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Homosexuality
Homosexuality in Non-Human Animals
Documents:
homosexual behavior is widespread in many species
web
Sara Goudarzi
LiveScience
2006-11-16
same-sex sexuality found in many species
web
LiveScience
2009-06-16
same-sex sexual behavior and evolution
web
Bailey NW, Zuk M
Trends Ecol Evol
2009-06-17