umm since when do cyborgs age........
oh and in my opinion though time travel may be possible it would be impossible to change the past, such as if you went back 80 years and accidentally killed your grandfather before your parent (mom or dad) was born then that would mean you would not be born right, so no your not just going to vanish from family photographs man you would have never existed in the first place and you could never have come back from the future to kill your grandfather, it would negate itself, or cause a time rift or something that would destroy the universe, which probably isnt the case becaue we are all here right now and if someone was able to go back in time later in the future they would have done so already in our past.....but I could be completely wrong.