But first, for many African Americans the idea of tracing a family tree has been little more than a dream.

NPR: Scholar Helps Black Americans Trace Family Roots

Moreover, the HDI tree represents an alternative way of branding the idea of Human Development and communicating its message graphically to a wide audience.

FORBES

And the idea of anthropogenic climate change rests on a great deal more than just tree-ring records, useful as they are for providing context to the current warming.

ECONOMIST: Leaked e-mails do not show climate scientists at their best