Could the Flynn Effect Be the Result of Decreased Parasite Loads During Pregnancy?
Paper here. The paper is looking at differences between IQs based on current epidemiological stats, but it seems the next step would be to look at differences in the same population over time. The policy implications need not be stated. Via Dienekes.
"...there is good and bad speculation, and this is not an unparalleled activity in science...Those scientists who have no taste for this sort of speculative enterprise will just have to stay in the trenches and do without it, while the rest of us risk embarrassing mistakes and have a lot of fun." - Dan Dennett