the other problem was that the male turtle's penis was not good. years earlier, he had fought with another turtle. his penis was damaged, so he could not have sex very well. starting in 2015, the zookeepers collected the male turtle's male reproductive liquid and placed it inside the female using medical tools. again, the female turtle laid eggs, but none hatched. the scientists tried something different every year. in 2019, the female turtle died because she did not wake up from the medicine the zookeepers gave her to make her sleep during the medical process. the zookeepers cut out and froze tissue from her female reproductive organs.