I smell a science storm a-comin'!!
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References:
"Nature of Argillaceous Odor" (1964) http://www.nature.com/nature/journal/v201/n4923/abs/201993a0.html
"Petrichor and Plant Growth" (1965)
http://www.nature.com/nature/journal/v207/n5004/abs/2071415a0.html
Human nose can detect a trillion smells
http://news.sciencemag.org/biology/2014/03/human-nose-can-detect-trillion-smells
Petrichor and fish spawning
http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8649.1974.tb04518.x/abstract
Camels seek out wet soil smells
http://www.theguardian.com/science/2003/mar/06/science.research
Chemistry of petrichor:
http://cen.acs.org/articles/91/i18/Scent-Rain-Strands-Honey.html
http://www.itsokaytobesmart.com/post/85815194542/compoundchem-the-third-graphic-in-the-aroma
http://www.scientificamerican.com/article/storm-scents-smell-rain/
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