Some news that would be completely mundane today but scary or shocking in the past.
Climate change, same sex marriage (though, perhaps not as shocking as some might expect, ditto anything trans related), potential mars colonization, coming off the heels of the Spanish flu, COVID news would probably freak em out. Ooh, the USSR being gone, and China being a world super power. The USSR would have been new to them, and it collapsing less than a century later would probably feel quite odd, especially if you could make them understand just how incredibly advanced the USSR got in such a short amount of time. Tons of stuff.
potential mars colonization
Yeah because we’re real close to doing that in 2023
1923, virtually every capitalist country in the world had just invaded the USSR 5 years ago, Japan only pulled out in 1922.
The USSR being gone only becomes shocking post WWII when they went from an agrarian nation wracked by civil war and famine, with zero tractor factories to sending 100,000 tanks into Germany 20 years later to putting a man in space 20 years after that.
