Yes it can.
But what other scientists can do now is, amongst other things, replicate the study and find different results that change the picture - highly unlikely, because the study took a very large sample and found a very strong correlation between low waist-to-hip ratios and higher intelligence both in women and their kids.
Or refute the methodology of the study - which would be difficult in this case, because the methodology complies with the highest scientific standards (and a sample 16,000 subjects is quite big by any standard in the behaviorist sciences).
Or question the initial hypothesis and claim that it's either an irrefutable hypothesis, or a scientifically uninteresting hypothesis - but they won't do this, because the hypothesis is both scientifically sound and researchable.