President Obama's director of the National Economic Council, Lawrence Summers, made no friends among women when, as president of Harvard, he tried to have a discourse about gender differences in the higher levels of math-intensive fields.    He quickly learned that speculation and conjecture are best left to philosophy undergraduate classes and actual women in academia don't much care what he thinks about their abilities.
New research from a four-year study shows that 'gender bending' chemicals which find their way from human products into rivers and oceans can have a significant impact on the ability of fish to breed, which could have important implications for ecosystem health and possibly humans.

Endocrine disrupting chemicals (EDCs) disrupt the ways that hormones work in the bodies of vertebrates, including humans.    They can be found in everything from female contraceptive drugs and hormone replacement therapy pills to cleaning soap - most well studied EDCs are those that mimic estrogen.