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Open Wide! Hippo's Teeth Get Annual Deep Clean

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Image: A zoo employee cleans the teeth of a 30 year old hippopotamus
A zoo employee cleans the teeth of a hippo named Kiboko at Himeji Zoo in Himeji, Japan, on June 4, 2014. Buddhika Weerasinghe / Getty Images

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A zoo employee cleans the teeth of a 30-year-old hippopotamus named Kiboko at Himeji Zoo in Japan on Wednesday. Kiboko's teeth are cleaned once a year as a way to teach children about the importance of brushing their teeth.

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