7 of 10: Dr. Barron Hall (left), a board certified dentist and oral surgeon from the Animal Dental Clinic in Virginia, and Dr. Carlos Sanchez (right), associate veterinarian for the Chicago Zoological Societys Brookfield Zoo, clean the open pulp cavity of the elephants tusk and prepare to pack the open canal, while Dr. Michael Adkesson (center), associate veterinarian for the Chicago Zoological Societys Brookfield Zoo, monitors the elephants anesthesia. (Photo/Barranquilla Zoo)

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