Dr. Giordana Grossi gave an invited talk on September 20 at the annual Young European Scientists (YES) Meeting. The talk focused on claims of “inherent” sex differences in scientific ability, which are often assumed to reflect the existence of biological constraints due to the effect of prenatal testosterone. Dr. Grossi discussed some of the assumptions behind the use of these terms and reviewed recent research on the topic. She argued that the empirical evidence does not support the hypothesis that prenatal testosterone is associated with scientific ability and that the investigation of the precursors of complex skills and behaviors would benefit from adopting a true developmental approach.