Study finds overall differences between groups of newborns by sex that are likely to be determined by biology
The question dates back to the first man and woman: how does the world shape the behaviour of the sexes, and what differences, if any, are present at birth?
Untangling the contributions of nature versus nurture has proved challenging for scientists, and controversial at times, but a new study of babies sheds light on at least one aspect of the puzzle.
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