There are several species of rhinos that have gone extinct, but the most recent one is the northern white rhino. The last male northern white rhino, named Sudan, died in 2018, and the two surviving females are too old to reproduce. However, scientists have used sperm from Sudan and another male that died earlier to fertilize two eggs from the females, Fatu and Najin, who now reside at the Ol Pejeta Conservancy in Kenya. The hope is that the breed can be revived after the fertilized eggs are implanted in a southern white rhino to gestate. Other extinct species of rhinos include the Indian Javan rhinoceros, which was declared extinct in 1920, and the Vietnamese Javan rhino, which became extinct in 2010.