AwesomeUsername said : "There are animals on this plant that don't age, once they hit a certain point of development they just stay at that point. They get killed however, but if they weren't they would be able to live forever."

Can I get an example of one that would fall under that category?  I'm racking my brain but nothing is popping up in regards to that category.

Entheo-gnosis said : "Humans devising means of attempting to live forever on earth would be like a fetus attempting to devise means to forever remain in the womb..."

Exactly, I feel like you would only be cheating yourself.  This life is just a chapter/step in the process, not the final goal I believe.  It's ok to leave here.  Life found you once, it will find you again, aswell as your loved ones.  The thought of having this earth forever is a very worldly point of view.  The bigger picture is, bigger 8)