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This is the second of a multi-part podcast series on the exhibit, "Earth Lab: Degrees of Change," from the Koshland Science Museum.  You can participate in the exhibit either by visiting the museum in Washington, DC or online at:


In this podcast we will look at the trends that compare today's climate with that of the distant past.  They include:

1.  Tree Rings

2.  Instrumental Records

3.  Ice Cores

4.  Corals

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