Nature: The earthy smell after rain is called "petrichor", a wo…

Question

Did you know? The earthy smell after rain is called "petrichor", a word coined in 1964. The smell comes from geosmin — a compound made by soil bacteria, released into the air by rain. Humans can detect geosmin at concentrations of 1 part per billion.

Accepted Answer

The earthy smell after rain is called "petrichor", a word coined in 1964. The smell comes from geosmin — a compound made by soil bacteria, released into the air by rain. Humans can detect geosmin at concentrations of 1 part per billion.

De aardse geur na een regenbui heet "petrichor", een woord uit 1964. De geur komt van geosmin — een stof gemaakt door bodembacteriën, die door regen wordt vrijgegeven. Mensen kunnen geosmin in concentraties van 1 deel per miljard ruiken.

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