After a dry spell, geosmin is released from bacteria spores as the rain hits the ground. That indescribable sweet smell is geosmin and is detectable to humans at .4 parts per million. We can smell it up to 7 miles away. Greater detection than any other molecule on earth.
After a dry spell, geosmin is released from bacteria spores as the rain hits the ground. That indescribable sweet smell is geosmin and is detectable to humans at .4 parts per million. We can smell it up to 7 miles away. Greater detection than any other molecule on earth.
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