I knew it would eventually happen.....

My grandson was over yesterday for a bit. He was thumbing through a magazine while I finished up paying a bill online. He said to me:
GS: Grandma?
Me: hmmmm?
GS: Do you know what a Circadian Rhythm is?
Me: (blinking a couple times and trying to rewind my brain) a what honey?
GS: A Circadian Rhythm.
Me: (knowing that I have heard the term before but can't put my finger not only on WHERE but a definition for it) Ah, it sounds familiar but I can't think off the top of my head right now what it is.....why?
GS: Well, its a sleep rhythm and I'm doing research into it for my project at school.
Me: That sounds intriguing . What is your project? (I am sure I saw his shoulders 'square up' a bit)
GS: Well, I'm arguing that school should start later in the day because teenagers are programmed by their Circadian Rhythm to sleep later and they are at their best later in the day. Even teachers are aware of this and that's why in the first two hours of school they really don't get on to you if you happen to fall asleep in class.
Me: (feeling certain he must have first hand knowledge of falling asleep in class) Don't you think that these rhythms could be altered if teenagers would simply get to bed earlier?
GS: Not really. Who wants to go to sleep when its still daylight outside (because of daylight saving time).
Me: Well, what about the teachers? Don't you think they should be at their best also? How can they effectively teach a class if the "adult" rhythms are programmed to be their best earlier in the day?
GS: I have to do more research but I'm confident I can find a good argument for that too.

I knew it would happen eventually.....that one day soon he would ask me a question that I didn't have the answer to. Part of me is glad....its as it should be, I guess. Our future depends on our children and we want them to be more knowledgeable than we are. The other part of me feels like he may not have as much respect for me since "I'm slipping". I wonder if I can find an effective way to "stall" him when he asks me something I don't know the answer to long enough for me to run and google it. That same day, later on, feeling he was on a roll....he asked me if I knew how to do algebra. I don't. I never had to take it in school and never felt the need to use it. He whipped out a pencil and begain to show me a sample problem. The smile on my face was wide....God, I'm proud of him.