A University of Chicago study has found that girls may be learning math anxiety from female teachers who have qualms about their own math skills. Sian L. Beilock, an associate professor in psychology, and her colleagues studied students of both sexes in the classes of 17 different teachers, most of whom were women, and found that the female students of the female teachers who thought they were not good at math were more likely to agree by the end of the year that boys were better at it. Those girls also scored worse on math tests.

It doesn't take much exercise to maintain health. Several studies have shown that, and the newest is published in the Archives of Internal Medicine. It found that women who walked at a moderate pace through middle age were healthier in their post-70 years, and women who walked at a brisk pace regularly had even more benefits.