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Love The Smell of Rain? There's an Ulterior Motive Behind The Lure of Petrichor

If you've lived outside a major city, the smell is instantly recognisable – the earthy scent of petrichor as rain hits dry soil. Now, new research has uncovered why it's not just us humans who are attracted to this incredibly pleasant odour. That luscious smell we can detect after rain comes from an organic compound called geosmin, which is produced by microbes, including the bacteria genus Streptomyces. We also know that Streptomyces releases geosmin when they die, and that humans and other creatures are particularly attuned to it. The question, of course, is - why does this happen?  Read more....

 

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