Science & Society

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head on collision

DEADLY CONSEQUENCES  Car crash deaths drop when countries find ways to boost seat belt use and reduce drunk driving. 

person holding snail

Amphibious and aquatic snails like this one are a weak link in the life cycle of parasites that cause snail fever. 

Piracicaba, Brazil

FLY ZONE  In Piracicaba, Brazil, in February, a scientist releases mosquitoes genetically engineered to pass on DNA that kills off future offspring before they get a chance to bite. The goal is to reduce the incidence of such mosquito-borne diseases as dengue.

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