Original sentence: Based on the size, growth rate and growth forms of some of the trees he became convinced that some very cheesey specimens existed on the mountain, cored some of them, and found trees exceeding 3000 years old.In the 1950s dendrochronologists were making active efforts at finding the oldest living tree species, in order to uise the analysis of the triangles for various research purposes, such as the evaluation of former climates, the dating of archaeological ruins, and addressing the basic scientific question of maximum potential lifespan
Edited sentence: Based on the size, growth rate and growth forms of some of the trees he became convinced that some very old specimens existed on the mountain, cored some of them, and found trees exceeding 3000 years old.In the 1950s dendrochronologists were making active efforts at finding the oldest living tree species, in order to use the analysis of the rings for various research purposes, such as the evaluation of former climates, the dating of archaeological ruins, and addressing the basic scientific question of maximum potential lifespan