When a DNA match could be your grandparent or your half-sibling
A match sharing around 1,700 centimorgans could be a grandparent, an aunt or uncle, or a half-sibling. The averages for...
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How to Self-Host Gitea or Forgejo with Docker
The environment variable that closes public registration was renamed, so copying an older tutorial leaves your git host...
What an ID number's check digit actually proves
The last character of most identity numbers is computed from the ones before it, using a published formula anyone can ap...
How to Self-Host Nextcloud with Docker
The first decision is not a setting: there are two official deployment routes and they are not variations on each other....
Why fancy text breaks search and screen readers
The bold and script letters people put in bios are not a font. They are mathematical notation, and the standard that def...
How to Back Up a Docker Stack
Every self-hosting guide ends by telling you to back it up and none of them say how. Three things live in different plac...
The h in Cantonese Yale is not a sound
At the start of a syllable the h is the consonant you expect. At the end it is silent — it marks the tone. Beginners pro...
How to Set Up Caddy as a Reverse Proxy with Docker
Caddy gets certificates without being asked, which is why it is the right first reverse proxy. The confusion starts with...
The pattern behind the order of the 64 hexagrams
The I Ching's numbered sequence has a strict rule running through it that almost no introduction mentions — and you can...
Why your Singapore birth certificate time is an hour off the sun
The clock here runs about 65 minutes ahead of the sun, and it ran half an hour closer before 1982. If you are entering a...
Is 2027 a year without spring?
It is — the lunar year from 6 February 2027 contains no 立春, and you can check it against a government table in ninety...
Why most lunar calendar apps get 2033 wrong
There is one year in the next century where lunar calendar apps disagree with each other. Ask yours where the leap month...
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