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 ...

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 ...