As we are programmed to die after a certain period. I believe species are also programmed to die after a certain period.
I believe every species has a definite life span on our planet earth and we may call it " species span", after that it becomes extinct whatever you may do. Ever entertained such idea ? Ever analysed what happened to neanderthal man, homo erectus etc why they became extinct or Why growth rate of caucassian is nearing zero or in the negative? Is the life span of species is also programmed? Even our earth also has a limited life span, its not going to be there for ever.