Using lasers, the researchers sampled these layers and were able to reconstruct past exposures in a process similar to using growth rings on a tree to determine the tree's growth history.
from WebMD Health https://ift.tt/2H6jHQ5
Using lasers, the researchers sampled these layers and were able to reconstruct past exposures in a process similar to using growth rings on a tree to determine the tree's growth history.
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