 Now, there are about 15,000 southern white rhinos in the wild in Africa. They're considered a threatened species. But because the rhinos were nearly wiped out, the population is very inbred, and that makes them susceptible to disease. Well, a team of researchers is now trying to safeguard their future by increasing their genetic diversity. They're harvesting eggs from southern white rhinos in zoos across Europe to help their wild cousins. Our science editor, Rebecca Murrell, has been to Dublin Zoo to find out more.