I want to start a discussion about the science that gives direction to the way time "flows."
It is fascinating to me. Why does the 2nd Law of thermodynamics hold? Why does quantum entanglement increase over time? Why does electromagnetic radiation follow only retarded solutions instead of advanced solutions?
To put it in simpler terms:
Why is the Past different from the future?
- Objects spontaneously fall towards the earth, but not the other way around.
- A vase can spontaneous break or shatter, but the reverse doesn't happen spontaneously.
- Waves radiate outwards from a point spontaneously, but don't converge to a pont spontaneously.
Some indication is that the Second Law of Thermodynamics comes from going from states that are less probable to states that are more probable.
In fact, the entropy associated with a certain macro-state is porportional to the ln of the number of micro-states associated with that macro-state.
Still that doesn't completely explain things like the radiation, or even the gravity direction (though the gravity related issues are expalined by Gibbs-Free Energy, but what explaines Gibbs-Free-Energy).
So lets speculate. I think it'll be interesting.
Einstein and Ritz had an argument over with was more primary--Einstein believed Thermodynamics explained the directionality of radiation, while Ritz believed that the direction of radiation was primary and lead to thermodynamics.
Note some other issues, like the topology of the universe will prohibit time-like curves that meet themselves without violating the laws of thermodynamics. Hawking had a theory that entropy (and perhaps our associated notion of time) would start going backwards at some point in history to allow such topologies.