Immortality? Science has advanced but not enough yet to understand the whole body. Even basic Newton laws can be defied easily beyond our imagination. An object can only move if an external force acts upon it. That itself can be wrong because even a rock which is made of atoms which is silicon in nature within which thousands of electrons are moving and that too in a particular path. So who is moving this?
My point is we are way far from all these hypes like immortality. Science is only what has been proven but there are many thing which science has failed to prove. Everything that take birth has to die is the law. Humans can't break it in future too as it's a cycle created already. Opinions differ but science has not yet proven what it claims too, so we should live a happy life than dreaming about immortality which could in one way impact the whole natural life cycle.