NaBloPoMo: What else don't they know?

Every year, I write about the Beloit College Mindset List and every year I remark on how little the new batch of college kids have experienced. This year, for example, marked the first post-Cold War class. These students have never known the Soviet Union; it's always been Russia. But I didn't really think about that until I talked to my students the other day about the Cold War. And I used the phrase "iron curtain" without thinking that it would need an explanation. But then they asked me to explain it. And they furiously scribbled down my words. And it slowly dawned on me just what it means that these kids never lived through the Cold War. Didn't watch the TV as hundreds of exhilarated citizens tore down the Berlin Wall. Didn't watch Oliver North dance an intricate tapdance through his trial (yes, I distinctly remember that). And then we talked about the first hydrogen bomb, 750 times more powerful than an atomic bomb. And they were shocked and horrified, having never... ever... heard of it. And I couldn't help but wonder: what else don't they know?