The second law of thermodynamics states that the entropy of the universe has to increase. Entropy needs to absorb energy so it can increase.
What this law of science implies is if entropy has to increase, and it needs to absorb energy to do so, net energy is being forever removed, from the universe, by the increasing entropy; second law. Our universe is leaking energy into entropy.
If we assume energy conservation, which is another law of science, this energy being bled from the universe, because of the second is being conserved, in a pool of energy, that is not fully accessible to the material universe. I call this dead pool energy in honor of the dead.
Two laws of physics; entropy and energy conservation, make provisions for the afterlife via the accumulating dead pool energy. I have presented this argument in physics forums. Nobody can refute it, but since so much is at stake, there is silence. Dead pool energy messes up a lot of physics theory like the cyclic universe theory since there is not enough reusable energy to reach the initial state implicit of cyclic. This state of science limbo is fine, as long as it is out there. They need time to think and prepare.
The human brain works based on neurons creating entropic potential. Neurons lower entropy as they isolate and separate cations; sodium and potassium, on the opposite sides of the neuron membrane. This requires up to 90% of the neuron's energy. These two cations would prefer blend to form a uniform solution bot inside and outside; second law. But the brain uses a lot of energy to reverse the entropy. In the brain, a constant entropy potential is created; rest neurons, and the second law is forced to act, in directed ways; memory, allowing each of us to constantly generate dead pool energy.
Conceptually, this means, our memory firing, due to the entropic potential and the second law, generates dead pool energy unique to each of us, via our unique memory firing. The mechanics for another realm is there; dead pool energy, and there is a dead pool energy source within each of us with very specific output characteristics they define each us. The only thing that is not as clear cut, with the laws of science, is if our dead pool energy contribution remains integrated, as us, or it simply merges with the pool.
The bible hints at the solution to this, but hint is not yet science. The Old Testament has the dead, asleep. This would imply our uniqueness is lost into a generic state. One cannot tell the greatest from the lowest if both are sleep, assuming we did not know who was who. Once awake, their consciousness will make it clear who is who. The New Testament has the dead more conscious; resurrection and first fruits.
If we apply these dogma as premises for science, this would imply early humans merged with the dead pool. As the dead pool evolved, it eventually allowed for sustained integration; life after death, but in an energy and information realm, not accessible in full, by the material universe; spirits/souls.