For girls, the age of puberty has been falling since the 19th century. The same period has seen a similar decline for boys (source) In the United States and other Western countries, girls have been reaching puberty at earlier and earlier ages. A recent longitudinal study has examined this trend in white Americans born between... Read More

Île aux Coudres, a French Canadian community on an island in the St. Lawrence Human biodiversity is slowly making headway in academia. It has three defining principles: 1. Evolution did not end, or even slow down, with the advent of Homo sapiens. It has actually accelerated. 2. It especially accelerated about 10,000 years ago, when... Read More

I used to believe in a direct causal link between father absence and early sexual maturity in girls. The reasoning was that a daughter’s sexual development is accelerated when her biological father is replaced by a strange male (such as a stepfather). At the time, I saw this finding as a way to counter the... Read More