Title text:
The family lore was that we've had it ever since it was ejected from a star-forming gas cloud, but it seems more likely that my great-grandparents probably just bought it while on vacation in the galactic thin disk.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3281/
This is going to cause a lot of problems in a few billion years. Either they have to introduce negative numbers or a lot of signs on the edge of star systems have to be changed…