sentences:  Subsequently, in the future, it might be possible to specifically mature the cells into specific cells such as neurons and muscle cells, in a similar way in which Katsuhiko Hayashi has grown mice out of simple skin cells.The DNA of a dozen northern white rhinos has been preserved in genetic banks in Berlin and San Diego.In August 2019, 10 egg cells (5 from Najin and 5 from Fatu) were harvested to be artificially inseminated with the frozen sperm of a northern white rhino, in September 2019 scientists announced that they fertilized in-vitro the eggs with frozen sperm taken from dead males; two of the resulting embryos were viable.