Summary: “Many analyses find a bottleneck in non-African populations dating back to around 50,000 to 100,000 years ago. This coincides neatly with the current estimate of the first wave of anatomically modern humans out of Africa. When humans first migrated out of Africa, they created a genetic bottleneck. What has not been noticed before, however, is a bottleneck of specifically male genetic diversity around 8,000 years ago. A recent paper in Genome Research suggests that, for every 17 female humans who reproduced at this time, only one male human managed to pass along his DNA.” –Ars Technica
Summary: The color red increases heterosexual men’s feelings of attraction toward women. In the current work, this basic red-attraction link is qualified by the initial attractiveness of female faces. In two experiments, red enhanced men’s ratings of female attractiveness, but only for faces pre-rated as attractive; red had no influence on perceptions of initially unattractive faces.
Summary: “When you have a conflict with your spouse or significant other, do you withdraw like a turtle into its shell? Or perhaps you expect your partner to be a mind reader about what ticks you off? Those are two of the most common types of disengagement in relationships, and both can be harmful, but in different ways and for different reasons, says researcher Keith Sanford, Ph.D., associate professor of psychology and neuroscience in Baylor University’s College of Arts & Sciences.” –Baylor University
Summary: “Identical twins in Finland who shared the same sports and other physical activities as youngsters but different exercise habits as adults soon developed quite different bodies and brains.” –The New York Times
Summary: Rejected by a person you like? Just “shake it off” and move on, as music star Taylor Swift says. But while that might work for many people, it may not be so easy for those with untreated depression, a new brain study finds. The pain of social rejection lasts longer for them — and their brain cells release less of a natural pain and stress-reducing chemical called natural opioids. – ScienceDaily
Summary: Users on OKCupid and mobile-based Tinder aren’t able to determine social norms or effective match-making techniques on the services, so they use Reddit to learn tips about online dating. Once there, they also find ways that allow them to “cheat the system” to interact with more potential dates.