The smell of rain

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But what makes rain smell so nice? There are several scents associated with rainfall that people find pleasing.
One of these odors, called "petrichor," lingers when rain falls after a prolonged dry spell. Petrichor — the term was coined in 1964 by two Australian scientists studying the smells of wet weather — is derived from a pair of chemical reactions.

Petrichor is the smell of rain. The word comes from the Greek words 'petra', meaning stone, and 'ichor', which in Greek mythology refers to the golden fluid that flows in the veins of the immortals.

Petrichor (/ˈpɛtrɪkɔːr/) is the earthy scent produced when rain falls on dry soil. The word is constructed from Greek petra (πέτρα), "rock", or petros (πέτρος), "stone", and īchōr (ἰχώρ), the fluid that flows in the veins of the gods in Greek mythology.