Scott examines conflicting evidence on whether humans choose mates based on parental imprinting or genetics, concluding that mate choice might be based on mysterious romantic love. Longer summary

This post explores the question of how humans choose their mates, examining theories of imprinting on parents versus genetic influences. It reviews several studies on animals and humans, including twin studies, that provide conflicting evidence. The post starts by discussing psychoanalytic theories and animal studies supporting imprinting, then moves to human studies with mixed results. It then examines twin studies that surprisingly show little genetic influence on mate choice. The post ends with the suggestion that mate choice might be based on romantic love, which is beyond scientific understanding. Throughout, Scott maintains a skeptical and sometimes humorous tone, highlighting the complexity and contradictions in the research. Shorter summary

Scott Alexander explores the potential link between falling testosterone levels and declining crime rates, finding the hypothesis intriguing but ultimately insufficient to explain observed crime trends. Longer summary

Scott Alexander explores the hypothesis that falling testosterone levels might be related to the secular decline in crime. He examines studies showing a significant drop in testosterone levels in American men from 1987 to 2004, and research linking higher testosterone to violent crime. However, he identifies several problems with this hypothesis, including timing discrepancies between testosterone decline and crime reduction, contradictory evidence, and the fact that crime is dropping in women at the same rate as in men. While intrigued by the potential connection, Scott concludes that the hypothesis doesn't fully explain the observed crime trends. He suggests further research, including studies comparing testosterone levels in violent criminals to the general population and proposing an examination of digit ratios in historical skeletal remains to track testosterone levels over time. Shorter summary

Scott shares a diverse collection of interesting links ranging from scientific studies and economic developments to cultural oddities and humor pieces. Longer summary

This is a collection of interesting links covering various topics from science, society, and technology. The links include studies about gender income gaps, nitrogen-fixing crops, racial representation in India, and unusual scientific findings. There are also some humorous entries about autocorrect fails and weather photos, as well as interesting cultural phenomena like the Patel Motel Cartel and Sweden's Gavle Goat. The post combines serious scientific and social commentary with lighter cultural observations. Shorter summary