when is it gonna happen - Time Travel

Time travel IS possible and has ALREADY happened, say esteemed physicists
TIME travel is possible and has already happened, according to several
reputable physicists.
One way to achieve time travel into the future would be travelling at
the speed of light in space, as first theorized by Albert
Einstein.
The accepted theory is that one would have to build a space ship that
can travel at the speed of light, and head out into space.
Theoretical physicist and string theorist Brian Greene, of Columbia
University, said:
“You can build a spaceship, go out into space and travel near the
speed of light, turn around and come back.
“Imagine you go out for six months and you turn around and you come
back for six months.”
While you are travelling at the speed of light, time stays slow
relative to the people who are standing still back on Earth.
As a result, you would be going fast while your clock would still be going slow.
Prof Greene: “When you step out of your ship, you’re one year older
but Earth has gone through many, many years.
“It can have gone through 10,000, 100,000 or a million years depending
on how close
to the speed of light you traveled.”
However, the only problem is that a machine travelling at such speed
would require an “unimaginable” amount of energy, while the stress
from the centrifugal force on the body would likely prove fatal.
But there is another feasible way to travel though time, and once
again it involves going into outer space.
Einstein also theorised that if you were to situate yourself on the
edge of a black hole,
time would pass more slowly.
Prof Greene explains in his Big Think video: “You hang out next to a
black hole for a while, you come back, get out of your ship
and it will be any number of years into the future, whatever you want
all depending on how close you got to the edge of the black
hole and how long you hung out there.
“That is time travel to the future.”
But time travel has already happened.
But no one to go again
will you go?
@christianolu