The original post says:
Today is the 20th anniversary of the launch of TravellerMap.
Since I’m lazy, go read the 10th anniversary post for some history.
https://travellermap.blogspot.com/2025/04/and-now-were-20.html
EDIT: And if you haven’t heard about TravellerMap, you’re in for a treat: http://travellermap.com/
Same thing happened to me when I discovered it.
You probably figured it out already, but in case you didn’t: the video I posted before is part of a playlist, and it’s an excellent way to get acquainted with the game.