In Special Relativity, space and time are relative.
[youtube]vrqmMoI0wks[/youtube]
An important concept in Special Relativity is the fact that time progresses at different rates depending on relative velocity. So if I travel by you at great speed, you will see that my clock runs slower than yours, yet I will see that your clock is the one running slow.
What is even more interesting is the concept of relativity of simultaneity. This is a necessary consequence of Special Relativity.
[youtube]ajhFNcUTJI0[/youtube]
This means that viewed from a high-speed particle moving from the Sun towards the Earth, that particle's past contains parts of my future. So what I'll do tomorrow is in the past of certain reference frames, and not only hypothetical reference frames, but the reference frames of real particles out there.
This ultimately means that our 4D (3D space + 1D time) Universe is set like the 3D (2D space + 1D time) loaf of bread that Brian Greene slices at different angles depending on movement. This slicing is called the "hypersurface of simultaneity".
More info on that here:
Spacetime and the Relativity of Simultaneity
So all this means that our future already exists and is set. If someone moves towards us at high speed (and the larger their distance to Earth the better), then their "now" is in our "future". They cannot actually see our future because information can only travel at the speed of light, but their hypersurface of simultaneity still intersects with our future.
And if our future is already set, how can we have free will? Yes of course, we choose our actions, but what we will actually choose in the future is already set just as much as what we chose in the past is set.
[youtube]vrqmMoI0wks[/youtube]
An important concept in Special Relativity is the fact that time progresses at different rates depending on relative velocity. So if I travel by you at great speed, you will see that my clock runs slower than yours, yet I will see that your clock is the one running slow.
What is even more interesting is the concept of relativity of simultaneity. This is a necessary consequence of Special Relativity.
[youtube]ajhFNcUTJI0[/youtube]
This means that viewed from a high-speed particle moving from the Sun towards the Earth, that particle's past contains parts of my future. So what I'll do tomorrow is in the past of certain reference frames, and not only hypothetical reference frames, but the reference frames of real particles out there.
This ultimately means that our 4D (3D space + 1D time) Universe is set like the 3D (2D space + 1D time) loaf of bread that Brian Greene slices at different angles depending on movement. This slicing is called the "hypersurface of simultaneity".
More info on that here:
Spacetime and the Relativity of Simultaneity
So all this means that our future already exists and is set. If someone moves towards us at high speed (and the larger their distance to Earth the better), then their "now" is in our "future". They cannot actually see our future because information can only travel at the speed of light, but their hypersurface of simultaneity still intersects with our future.
And if our future is already set, how can we have free will? Yes of course, we choose our actions, but what we will actually choose in the future is already set just as much as what we chose in the past is set.
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