Assessing the age of a living tree is straightforward enough—just extract a core from the tree's circular trunk and count the number of lines in the core formed by the tree's annual growth rings.

Scientists link baker’s yeast evolution to ancient human movements, suggesting we’ve been shaping microbial life far longer ...

New research from the University of Georgia reveals that the spread of baker’s yeast may mirror human migration patterns.

A similar distribution pattern exists ... of quaking aspen. This bark lives and carries out photosynthesis, attributes that make it unique among North American trees and likely contribute to ...

The basis of dendrochronology lies in a tree's unique pattern of growth rings ... just beneath the bark. The thickness of this ring depends on how much the tree grows during the year: favorable ...