Shortwave radio was great in its day. I used to spend many hours a day listening to international shortwave broadcasts, and talking with other amateur radio operators.

One day about 20 years ago I was driving through San Jose and happened to tune in to North Korea radio on the shortwave receiver I had installed in my car, and heard this news gem:

"Scientists are studying the brain of Respected Comrade Kim Jong-Il, because the Respected Comrade is capable of feats of mental power beyond the ability of ordinary human beings."

Even today, shortwave is making a bit of a comeback thanks to High Frequency Trading:

https://hackaday.com/2018/05/12/hft-on-hf-you-cant-beat-it-f...

https://swling.com/blog/2018/05/mystery-traders-using-shortw...