We're arguing about definitions, though. Think of the pyramids in Egypt. They didn't exist at the Big Bang yet, barring natural disasters or deliberate destruction, they will very likely still be standing when the Earth is absorbed into the expanding sun.
Same with people. If science finds a way of preventing our own DNA from killing us, then people could theoretically live forever, also barring natural disasters or deliberate destruction.
Heaven, though, frightens the living carp out of me if it's populated by Christians...