

Useless knowledge: a black hole can technically exist inside a super-massive star.
The gravity of the black hole pulls in hydrogen, the force of the hydrogen fusion and Hawking radiation pressure from the black hole try to push the hydrogen/star stuff out.
For awhile at least, with enough supply of hydrogen (that likely doesn’t exist in a large concentrated enough supply), it can hold itself in balance as the biggest star you’ve never seen.
Note: take this with a grain of salt, this is my understanding of a kurzgesagt video I watched while high.





And the United States government, whose nuclear launch systems for decades had a default “0000000” password on systems so old they figured nobody would know how to hack them in person anymore, and they’re incompatible with the internet.
It’s disturbing to me that my high school hobby of fixing and operating old computers meant I could have launched nukes.