April 16, 2018 – The smell that accompanies a spring shower is so evocative that it has its own word: petrichor. Watch as Reactions explores the unique chemistry behind the smell of rain:

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The American Chemical Society, the world’s largest scientific society, is a not-for-profit organization chartered by the U.S. Congress. ACS is a global leader in providing access to chemistry-related information and research through its multiple databases, peer-reviewed journals and scientific conferences. ACS does not conduct research, but publishes and publicizes peer-reviewed scientific studies. Its main offices are in Washington, D.C., and Columbus, Ohio.