How Old is History?

That is, how long is long enough before a given event is no longer a Current Event?

Well, according to the History Channel's President and CEO, Nickolas Davatzes, it's two weeks. I'm sure that played a part in the channel's decision to run a program documenting the construction of the Twin Towers on October 17.

The feature was completed before the attack, and originally intended to run in December. I can't fault the decision to run it earlier: If History is only two weeks old, then the WTC might be ancient history by December.

No, no, I'm only kidding. I think. I'm told it was a fine show (we don't get cable in the Purple household). I'm just wondering when the other end of history is. How old does something have to be to be so remote as to be completely irrelevant?

I feel a need to ask my children's teachers that question.