Our species will not live on forever - no species ever does, something is bound to happen to us - the question is what? and when?
So what can happen to us? Here are some possible scenarios:
A) Destroy itself thought human conflict using agents like nukes or bio weapons, we will develop new ways and more effective ways of killing our enemies, what’s to stop this agent from killing us all?
B) Be destroyed by degrading our ecosystem, we are growing exponentially and using up resources up faster than ever and we are damaging the whole planet itself to be able to sustain/regenerate our environment for living.
C) Replaced by clone-like superior engineered super-humans, genetic engineering will become more advanced as we master the art of modifying life, whats to stop us from altering our offspring to be more advanced than we are? to the point where the unmodified person of today will be classified as an older out of date species.
D) Replaced by machines, who knows maybe all those AI movies about killer robots will become true?
E) Exterminated through external forces as in comets or extraterrestrials wiping us off, basically anything from the sky.
F) Branch off into many species as we populate other worlds when we become more advanced in space travel. If groups of us end up leaving earth for other worlds to be isolated then we will be cut off from other groups thus branching into a new species if left alone for many many generations.
G) Evolve into new species over time here on earth, we cant stay the same, its a part of nature to consistently remove undesired genes and introduce new ones, at some point we will change so much that the person of tomorrow will not be able reproduce with the person of today thus creating a new species by definition.
I would like to hear any other scenarios or thoughts on this?