^ in the sense that matter can not be created or destroyed , so the atoms and molecules that form our bodies are endlessly recycled we are eternal. But as in continuing to live here on Earth for eternity I do not want it. For a start it is going to get a little crowded, we have more than enough people as it is with an average life expectancy of 75 or so. What would it be like if we all lived for 100,000 years let alone Eternity! Every person who has ever lived and all who will live in the future all on just the one Earth at the same time?