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As efforts to improve diversity in science, technology, engineering and maths accelerate, so the voices of those who question those efforts seem to get louder.
They say the STEM gender gap has its roots in innate biology, that men are inherently better at or more interested in these subjects. One of their favourite supporting arguments is that differences in male and female brains are clearly influenced by prenatal testosterone. Is there any truth in this claim?
As a biologist, I appreciate that genes and hormones are important in brain and behavioural development. But

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