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fwiends
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this post was submitted on 26 Sep 2024
594 points (97.4% liked)
Science Memes
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My fave parts (edited for brevity):
... and ...
Ohhh good.
Wait, 0.3mm is huge, you should be able to see that. I don't think this is right.
0.3mm in length, not diameter. Yes, you can see them, but they just look like dead skin/gunk to our eyes.
Image1
Image2
Image3
Gallery with visible accumulation of mites on hairs
Maybe we do see them, but mistake them for bits of skin or dirt.
Agreed. 1/64th of an inch is .016". An average human hair is .003" in diameter, that would be as long as five hairs wide. You wouldn't even need a magnifier to see the largest ones.
Combine the size with the fact that they are semi transparent and live in hair follicles and sebaceous glands, both of which are essentially under the skin, and that's why you don't generally see them.
Who uses inches at this scale? I mean, really, Wikipedia.
"Hand me my 1/256th inch ruler." --nobody
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.
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.
Please don't let the Amish at my work know that such small increments of size exist. They'll ask me to cut my trim to that level of tolerance
Josh & Chuck just got a tingle down their spines
This is why it's okay to make out with randos at parties and such. You get mono for 6 months plus accretion of zillions of new friends.
Fitting username :P
Although tbh they look kinda cute!