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Tree Rings Help Circle in on Dating Pre-History Events Solar flares create spikes in the Carbon-14 of woody plants that can provide anchor years for more accurate dating of artifacts.
One light ring plus one dark ring signifies one year of a tree’s life. Embedded in these rings is information about the climate in which the tree has grown, each circle a snapshot of the past.
The family tree of living and extinct organisms encompasses 50,000 species–only a fraction of the world’s history of life–and would easily take up hundreds of pages if laid out linearly.
Teeth act as a 'faithful archive of life' by forming layers like tree rings that reveal intimate details of a person's life such as when they got pregnant, fell ill or were in prison ...