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Would recommend for all age groups who enjoy educational programs.
Very good program, presenting various theories and facts relating to the formation of the valley, and why this granite is often so resistant to erosion.
In fact, comparing them with those that I ordered from National Geographic website, the quality of the content of these 2 sets are much better.
A fantastic and wonderful DVD set. Greatly appreciated!!!
Makes a great gift too!!!
This series is always worthwhile. Would recommend to anyone interested in Geology or Paleontology.Published 2 months ago by Rebecca S. Warren