Horse pox virus

People talk about resurrecting the Mammoth, the Dodo, the Quagga, or the Tasmanian devil, or any number of extinct (or mostly extinct) creatures. I'm all for that. I suggest removing cattle farming in Nebraska, Wyoming, Montana and adjoining areas of Canada, and repopulating the region with extinct megafauna. That would just be cool. There are difficulties with this, including figuring out exactly how to piece together the genome for the extinct animal, how to get a good level of genetic diversity in the neo-founding population, and how to raise the critter up from a zygote. For all these…