A giant panda once thought to be male gave birth to twin cubs this week in China. Jinzhu was believed to be male at birth, but the panda showed zero sexual interest after being shipped to Japan in 2000 to breed with a female. When scientists attempted artificial insemination, they discovered that Jinzhu had no penis, Reuters reports.
In 2005, scientists finally realized that the only irregularity in Jinzhu's anatomy was misplaced ovaries. One 2-hour surgery later, she was a "normal girl," the state news service reports. She was paired off with a male in March and gave birth 142 days later at the world-famous Wolong Nature Reserve. (Read more endangered species stories.)