The number comes from a simple game of trees—meaning the charts used in graph theory. In this game, you make a forest of trees using seeds.

The Yule tree graph The Yule tree is a graph with one edge coming in and two edges coming out of each branch-point. The branches represent the time periods between the evolution of new species.

LELAND, N.C. (WECT) - As the Cape Fear region continues to grow at an unprecedented pace criticism from residents has led local governments to reevaluate their tree policies and regulations. In Leland ...

Developer Steve Melkerson of Caliber Homes said Tuesday he has made changes to his development plans to save the tree.