The New York Times has a great infographic showing the results from a science test administered to 15-year old students in 65 different countries. The results are broken down by gender so you can see in which countries girls/boys score higher. One gender does not have an overwhelmingly higher aptitude for science. In some countries, boys excel; in others, girls excel (though girls do excel in a more countries than boys).
What should be immediately apparent from this infographic is that the gender that excels on this science exam is strongly location-dependent. Girls tended to underperform in the Americas (including the U.S.) and in Western Europe, but overperform in Northern/Eastern/Southern Europe, Asia, and the Middle East. This means that gender gaps in science ability don’t have to do with intrinsic ability (as some would suggest), but with other factors, such as cultural stereotypes. One suggested reason for the observed gender gaps is that stereotype threat is stronger in some countries. Countries also offer different incentives for pursuing math and science, and value math, science, and education differently.
Hopefully, information such as this will help quell opinions that boys are intrinsically more talented at math and science than girls.
Source: New York Times
Physicist/Feminist 
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