Before human beings walked the planet earth, there were prehistoric creatures that reigned and sowed terror in the world. Animals like dinosaurs, creatures that come out of your nightmares, and that we have only seen in historical documentaries and fiction. These animals are now extinct, but research is currently being done to bring them back to life. This process consists of inserting the DNA of the extinct animal in an embryo of a relative of this animal, whose DNA is similar enough to carry the baby of the extinct species. Although it is a great scientific advance, we should not bring any extinct creature back to our world for multiple reasons: the extinction of predators can benefit other species and make them stronger. Also, it gives these species the ability to expand and can be of great benefit to an entire ecosystem. So, don't get excited because scientists are trying to revive the dinosaurs, better prepare to tremble in fear when you meet the Extinct Animals We Shouldn't Bring to Life.