Billion Year Old Carbon

 Because I've developed this weird fixation on AM radio, I was listening to WXVA 610 (as I'm writing this, they're playing CSNs Teach Your Children), and they we're playing Crosby Stills Nash and Young's cover of Joni Mitchell's "Woodstock".  I've heard the song ("We are stardust, we are golden, blah blah blah hippie stuff hippy stuff stardust golden") but I've never listen to it before.
It's a hopeful thing, with a youthful energy about change.  When I heard the line in the third verse:
By the time we got to Woodstock
We were half a million strong
I kind of got a "wow" chill.

Yes, we all know how that worked out.
Here's Joni, with her original version.