By examining the DNA in dust, researchers from the University of Colorado Boulder and North Carolina State University have created a sort of bug census for the United States. They were able to create maps visualizing the range of such pests as dust mites and the Turkestan Cockroach. Although many of the species examined in the study do not actually live in the dust, they leave traces of their DNA. Samples of more than 700 homes in 48 states were taken. The data collected may prove useful in understanding allergies.
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