Used to be that we didn't think we could have babies conceived in test tubes or cloned domestic livestock, like sheep and cows. Now that's pretty much routine.
So with the discovery of a mammoth apparently with some of its ancient blood still liquid (though I will want to read the peer-reviewed description of that), I think that if it pans out, the inevitability of cloning a mammoth is one step closer.
After all, a female elephant could carry a cloned mammoth fetus to term, so it isn't like they'd have to make an artificial mammoth uterus.
I'm going to make a general prediction here and say that we'll have a living, walking cloned mammoth within 10 years, a lot sooner than men will get to Mars.