What causes this texture?
If you have a fediverse account, you can quote this note from your own instance. Search https://mathstodon.xyz/users/mjd/statuses/115691337448389296 on your instance and quote it. (Note that quoting is not supported in Mastodon.)
Today, for no particular reason¹, I was reminded of the fun fact that at the South Pole research station, their stored ice cream winds up so cold that they have to let it warm up for a few days before they can actually serve it. This comes from https://brr.fyi/posts/the-last-egg (the whole blog is very interesting if you like this sort of infrastructure information).
¹ okay it was because of https://mathstodon.xyz/@mjd/115691337448389296