Sorry, I couldn't resist! You need to pin down what you mean by science. Are you think about biological differences? Genetics? The sciences of inequality could also imply epidemiological and population studies, actually looking to understand social division scientifically. I suspect you mean biological determinism.
Picking up on Paul's thread the question is phrased to suggest a misunderstanding of science is. The scientific method applies across "all" science - The content of study does not determine what is classified as science/not science.
If I understand your question correctly, there is growing evidence that substantial genetically-based differences exist between men and women, contrary to the prevailing feminist argument that these differences are socially determined. Obviously, different cultures have different ways of socializing boys and girls, as we can see in the dramatic differences between, say, in Islamic and Western societies , but boys and girls are born with many biologically-wired dispositions.
popular media account: http://www.telegraph.co.uk/women/womens-life/11087100/Yes-its-official-men-are-from-Mars-and-women-from-Venus-and-heres-the-science-to-prove-it.html
There is psychology based research which discusses agency and communion. There are a significant number of studies over 50 year period that show that males are slightly more agentic than females particularly up to middle age. Agentic traits are those that are most closely aligned to masculine traits.