&gt;Which gives a ratio that can best be expressed as ¯\_(ツ)_&#x2F;¯.<p>A bit unrelated but I found it amusing the author used an emoticon in a magazine article (a reputable magazine, at that). Even more interesting, if you search for &quot;I don&#x27;t know emoticon&quot; the first result on Google is an article from The Atlantic on the subject: <a href="http:&#x2F;&#x2F;www.theatlantic.com&#x2F;technology&#x2F;archive&#x2F;2014&#x2F;05&#x2F;the-best-way-to-type-__&#x2F;371351&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.theatlantic.com&#x2F;technology&#x2F;archive&#x2F;2014&#x2F;05&#x2F;the-be...</a><p>And while facts like the cell to microbe ratio may be useless for most in terms of practicality (as someone else mentioned), for me they are not only interesting but instill the same sense of wonder as knowing that there are ~100 billion stars in the Milky Way. Definitely makes you think about the scale of numbers, if nothing else.