Vox reports
Specimens like this one, housed at the Smithsonian National Museum of Natural History in Washington, DC, represent priceless bits of scientific data. Studying them has revealed everything from changes in butterfly wing shape over time to the genetics of extinct species to new species altogether. They are also now the subject of a passionate debate.
Read more Is it still ethical to collect butterflies for science? – Vox
Natural History Wanderings 
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