THIERRY BERROD, MONA LISA PRODUCTION / SCIENCE PHOTO LIBRARY THIERRY BERROD, MONA LISA PRODUCTION / SCIENCE PHOTO LIBRARY
Narave pig. This type of pig is found on the Pacific islands of Vanuatu, where it is considered sacred. Narave pigs are intersex male pseudohermaphrodites, caused by a lack of the male hormone testosterone. A narave pig develops both male and female organs. In Vanuatu, pigs are a status symbol and a form of currency, with several types of rare pigs bred for ceremonial purposes.
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