Dear every body: I have been invited to write an article for children to
introduce them the idea of ageing. Both physical and psychologic changes
are welcome by the editors. But I think something more interesting would
be of value, especially in this molecular biology era. I knew the recent
cloning the longevity assurance gene in yeast. But do you think it is a
proper subject for children? Any suggestion to help me is greatly appreci-
ated. Thank you very much.