Hi Bill Nye.
My name is Emre.
I thought of a time machine that basically ran on all the data based on your brain so
it basically calculated all the information on your brain and all the data in your life
and it would create a vortex, which you would go back through and you would go back in time
so it's a time machine.
Now I was thinking that if you went back once you would have the memory of going back so
that would create another vortex in which you would go through again and once you got
to the dimension, which was in the past, the other time machine, with your memory, would,
because you're the person it would also form another vortex which you'd go through and
you keep going through infinite vortexes until you were lost and come in infinite space and
time.
Now, my question is would it be possible to generate enough electricity to be able to
create another vortex which would accelerate time and bring you and generate enough power
to bring you back all the way back to your time and keep it stable with the time machine
and you?
So could you please answer that?
Well, of course.
It's just a very straightforward question.
What?
So what are the problems, Emre?
Is that right?
Emre one of the old problems, in all the science-fiction stories that involve time travel is can you
go back in time and change things so that you didn't exist?
Can you go back in time and change things so that by the time it's now you're fabulously
wealthy?
Can you go back in time and change things so that the world is completely different
and better?
Or can you go back in time and accidentally screw everything up?
These are old questions in science fiction.
And I got to say so far no you can't.
However, recently, by recently in the last ten years, some physicists, and the way I
remember this these guys were in Japan, showed that you could build a time machine if you
are allowed to travel near the speed of light in this time machine in a big circle and you
could only go back in time to when the machine was built, this is in theoretical physics.
However, in order to go faster or as close to the speed of light you need enormous amounts
of energy and it might stretch you where your head is being accelerated more than your feet
and it would kill you maybe.
These are great questions.
And I noticed you use the word vortex a lot.
A vortex is a whirlpool like the center of a hurricane is a vortex and when the water
goes down the drain in the bathtub that's a vortex.
And there is a fabulous thing I hope you learn about in a whole discipline called fluid mechanics,
the mechanisms by which fluid flows called vorticity.
Vorticity is a fabulous word.
So I appreciate you throwing around the word vortex, but I'm not sure it's exactly what
you mean when you're talking about time travel.
But think about it, can you go back in time and change things so that you never existed?
It's an old question in science fiction and it's cool, but as far as anybody knows time
only goes one way.
And as far as anybody knows nobody knows why that is.
Going back in time is really hard and it's related to this thing that has to do with
heat.
Heat always spreads out.
Heat never spontaneously concentrates on its own, by spontaneous I mean on its own without
influence.
In the example I'll give you you go all over the world, look at everything you're ever
everything to look at, look at a glass of water, look at a lake, look at a pond, they
never just freeze in the summertime.
It never happens.
They heat doesn't go down to the bottom of the pond or up into the atmosphere and then
freezes on its own.
Energy always spreads out and when something spreads out it's moving over a distance over
time.
So time and the spreading out of energy are intimately connected or closely related and
there's something about that that keeps us from building time machines.
Carry on.