Chicago: Ice crystals plucked from clouds and quickly analyzed in flight show bits of biological material
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/biological-matter-sky-helps-make-clouds
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere-science
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research-agencies
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us