The male brain is a bit larger by volume and mass (~1450ccs in males versus ~1350ccs in females, ~1300g in males versus ~1150g in females). I could provide you with a laundry list of sources, but this information is readily available and well agreed upon and can be confirmed with a quick Googling. This doesn't appear to have a major impact on intelligence, however. IQ statistics will give men a slight advantage or none at all, but even sources that credit men with higher IQs put the differences in average below 5 IQ points (for perspective, consider that the standard deviation among men is over 15 IQ points). It does seem to be true that women's intelligence varies less than men's (extreme examples on the high side and the low side of the intelligence spectrum are much rarer among women than men), but the difference in average is very small, if existent at all. As for the assumption that "all the great technologies were invented by men," I have to just assume that you've somehow overlooked the last two centuries, and particularly the last five decades (as it turns out, people are much more able to invent things when they're allowed to be educated, or when it's not assumed that their spouse should really be credited for anything they produce).