In the famous movie, Jurassic Park, scientists used DNA of extinct dinosaurs to bring them back to life. Now, according to Energy and Environment News, genetic resurrection of extinct animals may not be purely science fiction. Indeed, advances in molecular biology and genome engineering is leading to a growing field of research called “de-extinction” in which long gone species, or hybrid animals very similar to them, could again roam the Earth. One target species is passenger pigeons which used to be very abundant in the U.S., but went extinct a century ago. And by the way, there is no viable DNA from species as old as dinosaurs so don’t worry about meeting a T-Rex anytime soon.