Science Memes

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fwiends (mander.xyz)

submitted 1 month ago by [email protected] to c/[email protected]

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[–] [email protected] 48 points 1 month ago (12 children)

https://en.wikipedia.org/wiki/Demodex

My fave parts (edited for brevity):

The adult mites are 0.3–0.4 mm (3⁄256–1⁄64 in) long. Each has a semitransparent, elongated body that consists of two fused parts. Eight short, segmented legs are attached to the first body segment. The body is covered with scales for anchoring itself in the hair follicle, and the mite has pin-like mouthparts for eating skin cells and oils that accumulate in the hair follicles.

... and ...

The mites are transferred between hosts through contact with hair, eyebrows, and the sebaceous glands of the face.

Ohhh good.

[–] [email protected] 17 points 1 month ago* (last edited 1 month ago) (1 children)

3⁄256

Who uses inches at this scale? I mean, really, Wikipedia.

"Hand me my 1/256th inch ruler." --nobody

[–] [email protected] 2 points 1 month ago (1 children)

I learned recently that machinists used to use fractions to indicate tolerance, like a dimension given as 5/16 could be ±1/32 of an inch, because anything less than 9/32 would round to 4/16, and anything more than 11/32 to 6/16.

[–] [email protected] 3 points 1 month ago

It can still happen, but usually at the customer's request/requirements. We actually use inches at a much smaller scale, but use decimals instead of fractions.

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