Fun Fact Time!
The human nose can smell and detect geosmin, a chemical compound responsible for the odor of petrichor*, in concentration levels as low as 400 ppt. To put this into perspective, 400 parts in a trillion is like 1/122,000 of a fine grain of sand in an Olympic-sized pool.
⁎Also see November 24 2024
The human nose can smell and detect geosmin, a chemical compound responsible for the odor of petrichor*, in concentration levels as low as 400 ppt. To put this into perspective, 400 parts in a trillion is like 1/122,000 of a fine grain of sand in an Olympic-sized pool.
⁎Also see November 24 2024
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