Betty Nickerson, writer, sociologist, curator and TV producer - now in her mid-seventies - knows that when it comes to aging, you just can't believe anyone under 60.She has spent decades talking to ageful women at bus stops, checkout counters, doctor's offices, rallies, meetings and funerals. And she knows that her Age Mates are not little old ladies, but women with enormous energy to give to the future of the world.From Nickerson's formal and informal...