Other forms: dendrochronologists
A scientist who studies the rings in tree trunks is called a dendrochronologist. Experienced dendrochronologists can determine precisely how old a tree was when it died or was cut down.
Dendrochronologist is derived from the Greek dendron, "tree," and khronos, "time." The focus of this kind of botany is to explore the history of a specific tree, and to learn more about climate cycles and changes using growth rings as clues. Dendrochronologists can determine when there were heat waves, droughts, and insect infestations by studying cross sections of tree trunks.