Heh. 
Don't know, Laurel. But I do know that (for me anyway, and a lot of my friends and collegaues my age), this feels like a really rockin' age to be. I feel more centered and grounded in myself than ever, more in touch with my body, my heart and my mind, and just really...I don't know, enthusiastic and seeking about everything in a way I wasn't in my teens or twenties.
Of course, in ten more years, I may same the same thing about now, if I'm doing it right. 
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Heather Corinna
Editor and Founder, Scarleteen
My epitaph should read: "She worked herself into this ground."
-- Kay Bailey Hutchinson