"argillaceous odour", known since 1964 as "petrichor". The most noticeable component is geosmin, detectable by the human nose at 0.4 parts per billion. en.wikipedia.org/wiki/Petrichor

"argillaceous odour", known since 1964 as "petrichor".
The most noticeable component is geosmin, detectable by the human nose at 0.4 parts per billion.
en.wikipedia.org/wiki/Petrichor

? TBD

Bluesky post by @a-bezoar.bsky.social