PETER RYAN / SCIENCE PHOTO LIBRARY. PETER RYAN / SCIENCE PHOTO LIBRARY.
Freshly felled pine trees Pinus sp stacked on a forest floor in Wales, showing annual growth rings. Each ring represents one year's growth thereby revealing the age of the tree. Study of the rings can indicate abnormalities due to disease & stress experienced during growth. In addition, factors relating to environmental conditions at the time of growth can be determined.
Model release not required. Property release not required.