Prior to Earth Day showing up on the April calendar, Arbor Day was, and still is, celebrated on the fourth Friday in April. Trees, especially oaks, played a role in our country’s history long before ...
The activity below allows you to build a tree-ring chronology. Each horizontal bar represents the tree-ring pattern for one tree. By looking for matches in the patterns, you should be able to build an ...
Tree-ring data from geographically disparate growth regions help uncover the precise age of wood used in the Mediterranean in the Bronze and Iron Ages, according to a study. Tree-ring records gathered ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results