Just like the Bison, mammoths are large, easy to count, slow to breed and relatively speaking, didn't die out all that long ago. Jurasic Park really doesn't apply here. What's really scary is a species that is so sucessful that they cause mass extinctions of untold thousands of species small and large. More extinctions happen every day in persuit of resources. So sucessful they may even threaten the ability of the planet to support life some day. We have a problem far, far worse than any Jurasic Park scenerio. Jacques Cousteau in the 1960's was asked by a reporter "What do you see as the world greatest problem". The reporter was expecting him to respond with an answer regarding mans impact on the oceans, but rather got the response "The greatest problem facing mankind is his own success. The earth cannot sustain the growing population of human kind".