Think about it this way: if someone were to raise 30 boys and 30 girls and teach them the exact same things (in the same way) for their entire life, give them tests and find out their IQ…. Could you really say that the boys are smarter? I think not!
One may only be able to say that guys know physics or calculus or whatever because they (wanted to and) learned it, but a girl has the same brain capabilities and can learn/retain as much knowledge as any man. (if not more.) No matter how many studies are done, no one can actually generalize and say for sure that one gender is smarter or dumber than another.
And even if some men were smarter in one area, woman are smarter in the other.
BTW the professors were male. Find me a female proffesor that will prove her gender is dumb!