"From a thermodynamic perspective, every system tends toward increasing entropy-and-disorder, and the only way you can combat that is by constantly inputting an external source of energy. In other words, everything about you, including your body and mind, is destined to eventually break down."
"Although you might try to leverage the power of relativity to dilate time and slow its passage, that will never work from your individual perspective; time only dilates or slows relative to an observer in a different reference frame from your own."
"While nearly all of us living today will certainly be dead in another century as we remain on Earth, the lessons from both special and general relativity teach us that there are a few physical scenarios that would maximize the amount of time that we can spend as living creatures within our Universe."
Physics fundamentally prevents individual immortality through entropy and thermodynamic principles requiring constant energy input to combat disorder. Time dilation from relativity cannot extend personal lifespan since observers always experience one second per second in their reference frame. However, relativity offers relative immortality possibilities—extending lifespan relative to the rest of the universe rather than absolutely. By understanding spacetime as a four-dimensional fabric integrating space and time, specific physical scenarios involving motion and gravitational fields can maximize the duration organisms exist as living entities within the universe, providing practical pathways to extended existence.
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