When Japan's Osaka Tennoji Zoo took in a hippo named Gen-chan seven years ago, they were told the young animal was a male. Recently, they took a DNA test and found out the mammal is actually a female.
A hippo at the Tennoji Zoo in Osaka, Japan, was called a male for seven years after the zoo acquired it. Then came a recent DNA test, which found that the animal was a female. The hippo, named ...
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