Brainteaser

In the ‘70s, Memorex ran a commercial with Ella Fitzgerald, (or maybe it was Ellen DeGeneres, I can’t quite remember which) singing a note so powerfully that the sound shattered a wine glass. Then they played a recording of her singing the same note on Memorex tape and it shattered another wine glass.

My sister and I were amazed. We took turns screaming at our mother's good wine glasses to see if we could accomplish the same thing. Luckily, we were unsuccessful in breaking her wedding crystal. What the heck were we thinking, anyway?

This brings us to this week’s brainteaser.

What is so fragile that it can be shattered simply by mentioning its name?

Give up? . . . check the answer.