They want to clone a whooly mammoth

Just saw some program about cloning a whooly mammoth that was found in great condition in the sence of a science. They basically have enough to map its dna and som scientists want to clone the mammouth and have it back in the place where it once roamed. Now my first thought is there is a reason why its extint and it should be probaly kept that way instead of finding out too late.
Its an interesting thought all this dna and cloning bable but its not a practice that man is ready for yet. Hence thier is diseases we  cant stop and far more science to be aquired.