Just looking at this picture makes my lungs seize up; I am SO allergic to cats. On this episode of Distillations, we examine the science of allergies. First we look at the development of hypoallergenic pets. Then producer Gretchen Kuda Croen visits the first ever dust library – a collection of individual dust particles that could help health experts determine what components in the air are likely to make us sick.

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Image courtesy of Flickr user admiller.