De-extinction describes the process of creating an organism that belongs to or closely resembles an extinct species. While this process was once a science-fiction fantasy explored in films like Jurassic Park, recent biological and technological breakthroughs suggest that reviving extinct creatures, like the passenger pigeon and the woolly mammoth, could soon become a reality. The benefits of de-extinction, supporters argue, include correcting mistakes of the past by bringing back extinct organisms and ecosystems that could help curb climate change. Many scientific breakthroughs are initially met with skepticism and worry, they note, but eventually become accepted and celebrated. Opponents of de-extinction, however, question whether it is ethical, let alone feasible, to bring back extinct creatures. They contend that reviving extinct species could cause serious and unforeseeable problems and reverse the course of nature. It would be better, they advise, to focus on preventing current species housands of which are endangeredrom going extinct. Should scientists bring extinct species back to life?