The place: Pasadena, where a Caltech geochemist named Clair Patterson (“Pat” to his friends) is walking down a city street, clearly anxious as he sees “danger from an invisible menace” everywhere - which the animated teaser portrays as purple splotches contaminating surfaces everywhere. ![]() ![]() The same can be said for a material like lead, as we learn in this week’s “Cosmos.” ![]() It’s often said that science can be a double-edged sword, used for good or ill.
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