Adam Lane Smith Retweeted James Wong
Adam Lane Smith added,
James WongVerified account @Botanygeek
The smell of the air after a storm is caused by Geosmin: A chemical released by dead soil bacteria.
Humans are hyper sensitive to it, capable of detecting at a concentration of 5 parts per trillion.
It's theorised in our evolutionary past this helped us seek out water.



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11:15 AM - 28 Jul 2018
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