>> and more and more, then you take that creature and put in a little more mammoth? >> one could do it that way or you could simply change as much as you wanted to in that first step. it would require doing this more than once. elephants and mammoths, we assume, are highly social creatures. you wouldn't want to bring one back. you would have to bring back populations, families, lots of individuals who could pass on the knowledge that it is to be a mammoth. this really is where i have the most issues with this particular process. >> explain. you're fascinated by the science of it. you do think technically it's possible to do what you just described, but you don't think we should. >> for mammoths, i don't. the reason that i don't think it would be fair right now to bring mammoths back to life doesn't have to do with mammoths, but with 'em fants. -- elephants. we noel fants fare poorly in cap fifth, often fail to reproduce even with our help. if they do reproduce, they're often mean or even kill their