Will resurrecting an extinct species become possible in the future?

Will resurrecting an extinct species become possible in the future? "Could an extinct species come back from the dead? It may sound like something from the realms of science fiction but a team of scientists has decided to give it a go.
The group, from Russia’s Siberian Mammoth Museum and Japan’s Kinki University, want to clone a woolly mammoth using marrow cells discovered in August in a well-preserved thigh bone. If they succeed – and they hope to do just that within the next five years – it will raise the possibility that other bygone beasts might be brought back to life. So how probable is it that we could ever visit a real-life Jurassic Park? "