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Sharks Then and Now
Sharks have been on earth for a very long time. Dr. Bruce Carlson of the Georgia Aquarium explains how they've changed but, in most ways, remained the same.
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Shark Week:   Sharks Then and Now
Sharks have been on earth for a very long time. Dr. Bruce Carlson of the Georgia Aquarium explains how they've changed but, in most ways, remained the same.
Aired: 8/6/10
Views: 16774
Network:  Discovery
 
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