Have you smelled the ‘Petrichor’? Where does that special scent come from in rain after drought?

When the first raindrops fall after a long dry period such as in recent weeks, you soon notice that your nose is stimulated by one, for many, wonderful scent. It almost seems as if every plant and stone celebrate the arrival of the much needed water with a cloud of perfume. But how exactly does this scent arise?

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