Immortality...I think it is the only word human searches for since the beginning of creation till now.Man searches for it because it is our nature
The only proof for that -in my opinion- when Satan tricked our father Adam to eat from -what satan claimed-" immortality tree" .....If you notice Prophet Adam searched for to be an immortal After we knew that we are mortals, we search for another way to be immortal. In some old religions,they thought that the spirt of the person didn't die with his death and it controls another animal or person.
Recently,the idea of how to be immortal has changed, by the vampires. Vampires are immortals ..they don't existed .....They drink human blood to give them more ability to live and not to die
In our religion, man may be immortal by an useful science helping human or a charity ......
Finally......,
to be mortal or not .... It's your choice of life