I was wondering the same. I would guess the dimension is high (maybe in the 10s or 100s?), and smells should be rarely &#x27;similar&#x27;, because I believe most smells can be traced to a single compound or family of compounds (with shared structure). For example, &quot;fishy&quot; smell seems to be associated with a singe molecule, Trimethylamine [1].<p>I got a single hit from a google search:<p>&quot;On the dimensionality of odor space&quot;
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