At some point, scientists may be able to bring back extinct
animals, and perhaps early humans, raising questions of ethics and
environmental disruption.
Twenty years after the release of Jurassic Park, the dream
of bringing back the dinosaurs remains science fiction. But scientists predict
that within 15 years they will be able to revive some more recently extinct
species, such as the dodo or the passenger pigeon, raising the question of
whether or not they should – just because they can.