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Episode 1
About Search Time Tree Ring Lab Resources Home
Searching Through Time - Tree Rings
Tree Rings

The graph in the timeline above represents average temperatures for the pasttwo thousand years. How were scientists able to gather this sort of data? Theanswer lies in the center of trees. Click the next button below to learnmore about tree ring analysis and what it can tell us about the past.

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Ice Cores Tree Rings Carbon-14 Dating Putting It All Together