Giraffes have a compensatory precision in their movements, so that although it takes longer for them to respond to stimuli, they might do it more accuracy. The move fiber in a given nerve, the more fine-tunes a response to stimuli.
The reason why stars does not die when it is there time is because they tend to fuse in different and more heavier elements. In that way, it prevents them from dying for they were able to have the components of different elements, extending their lives and prevent themselves from dying on the time that they were supposed to.
It would be temp if my teacher explained it right. hope this helps