"Cannot attain eternal life?" Wang Qi nearly laughed aloud.
What kind of nonsense was "cannot attain eternal life"? A mere Foundation Establishment Realm cultivator, who did not even know whether he could cross the heavenly barrier of the Primordial Spirit, was actually afraid of being unable to live forever?
But after laughing a few times, Wang Qi realized something was wrong.
This world really did not seem to support eternal life...
To use cold to warm, with no other change, was impossible. To take all the heat from a single source and convert it entirely into useful work, with no other change, was impossible. In an irreversible heat transformation, the infinitesimal increase in entropy was always positive.
The third law of Burning Sky, the Second Law of Thermodynamics—or the law of entropy increase—held true in this world. It was an empirical summary that all physical and chemical processes related to thermal motion were irreversible within finite space and time. Here, one of thermodynamics' fundamental laws could not be defied.
Within an isolated system, entropy increase was inevitable.
The universe was the greatest isolated system. One day, all usable energy in the universe would turn into thermal energy. Matter would cease moving, microscopic structures would no longer endure, space would lose its meaning, and time would be utterly destroyed.
This was heat death, the end of the universe.
The true essence of longevity was to cultivate oneself into a completely open system, constantly exchanging with heaven and earth to maintain a state of negative entropy. By anchoring oneself to the universe in this way, one could naturally live as long as heaven and earth.
But the universe was not eternal and indestructible.
"Heh... hehehe... Hahahaha... HAHAHAHAHAHA!" Yang Ziping suddenly burst into crazed laughter. "The universe is not indestructible. Heaven and earth