TED DİYARBAKIR COLLEGE / 11-C To Bring or Not To Bring Extinct Species Back To Life? Roza YALÇIN Since the advent of human beings, a lot of species got in danger. Between 30 and 159 species disappear every day. More than 300 types of animals have already vanished. The evolution of human beings made the world less green and full of dangerous materials. They started harming habitats with contamination which decreased and endangered the variety of species. Today, we have lost lots of animals such as dinosaurs, passenger pigeon, woolly mammoth, etc. Hovered on the scientific fringes and new advances in genetic engineering, especially the CRISPR-Cas9 Revolution, researchers believe that it’s time to bring some animals back. But the question is: Should we do it or not? If we have a closer look at the scientists’ plan on bringing them back, we can see that they need those animals’ genetic material. Also, according to scientists, the animals that will be brought back will be more like hybrids. For example, if we look at the passenger pigeon, scientists need to use a similar animal’s genetic material to have the closest copy of it. There’s another question, too. Is it ethical to bring them back? If the resurrected animals are reintroduced to their changed habitats, they might suffer. Also, they might harm the habitats and the species living there. What if the hybrids start acting like the original ones in time? There are some possibilities to manipulate their behaviour to fit in the modern habitats, but there is also a chance to behave like their wild ancestors. “De-extinction” of animals can help the damaged habitats, but I believe that it’s always better to be sure of and be thankful for what we have.