[Solved thanks to @tal. See instructions below.]
I’d like to subscribe and occasionally post to some usenet newsgroup like sci.physics or sci.physics.research. It’s difficult! I tried to simply enter “sci.physics” in Thunderbird’s Newsgroup reader, but apparently it doesn’t work simply like that… Even subscribing to news.eternal-september.org didn’t help – I think my understanding of providers and groups is very confused.
Could anyone kindly help?
I vaguely recall in the 90’s that email clients had offline reading for newsgroups, since the pattern with dialup was connect-grab everything-disconnect.
But that was a long time ago, and I wouldn’t trust my memory too much. Maybe I had an offline reader app.