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Caption: Ph.D. students Alessandro Franchin and Mikko Äijälä in front of the aerosol measurement cabin at the SMEAR II measurement station in Hyytiälä. This image relates to a paper that appeared in the Feb. 22, 2013, issue of Science, published by AAAS. The paper, by Markku Kulmala at University of Helsinki in Helsinki, Finland, and colleagues was titled, "Direct Observations of Atmospheric Aerosol Nucleation."
Credit: [Image courtesy of Juho Aalto]
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