Like the trees ... same tree that was a seedling when, say, King Tut was a boy. Now, if only King Tut and the rest of us brief-lived humans could have figured out a way to hang on so long.

The labels at the "tips" of a phylogeny can correspond to individual organisms, to species, or to sets of species, as long as each tip makes up a separate branch on the tree of life. In fact ...

A time capsule to the dinosaur age, dawn redwoods trees are growing in Michigan ... a compelling history. Living as long as 2,000 years, the species of tree has existed since dinosaurs roamed ...