Without doubt, the most intriguing evolutionary pressure of all is sexual selection. The how and why behind our choice of mates, and how evolution hasshaped our reproductive organs to achieve reproductive success, provide some fascinating insights into nature at work. An elegant demonstration of the contribution of sexual selection to brain evolution can be seen […]
A study appearing in the journal Human Genetics has identified several areas of DNA that appear to influence whether a man is heterosexual or gay. University of Illinois at Chicago researcher Brian Mustanski found stretches of DNA that appeared to be linked to sexual orientation on three different chromosomes in the nucleus of cells of […]
Researchers in the Oregon Health & Science University (OHSU) School of Medicine have confirmed that a male sheep’s preference for same-sex partners has biological underpinnings. A study published in the journal Endocrinology demonstrates that not only are certain groups of cells different between genders in a part of the sheep brain controlling sexual behavior, but […]
