And many old folks swear it will rain when dizziness hit them.
Now many folks young and old will swear it will rain by smelling the air.
The smell is called petrichor, the scent of rain falling on dry earth.
It’s caused by a couple of compounds in the soil, one of them known as geosmin.
The human nose, not normally considered a particularly acute instrument, is extraordinarily sensitive to geosmin which is produced by several types of bacteria and algae.
When a storm threatens and a few molecules of geosmin waft your way, that signifies rain is imminent shortly.
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