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March
11, 2004:
Why Time Travel Really Is Possible
Interview
with Brian Greene, author of The
Fabric Of The Cosmos
Mike
Carruthers:
Traveling through time into the future, it sounds like science
fiction but...
Brian
Greene:
Science and particularly Einstein's relativity, shows that you
can travel to the future, no ifs, ands, or buts.
Physicist
and professor Brian Greene, author of the book The
Fabric Of The Cosmos, says accomplishing this is another
matter.
It would
require again moving very quickly, or as it turns out experiencing
a strong gravity field. And these things at this moment are
beyond what we can achieve technologically. But from the point
of view of physics as we know it, Traveling into the future
is within the realm of possibility.
So how would
you travel to the future? Well, first you need a rocket ship.
You head
out from earth, you go very fast maybe at 99% of the speed of
light or even faster you go out for maybe a year and you turn
around and come back. But your motion through space, very quick
motion through space, will have the effect that when you land
on earth it will be a thousand or ten thousand years into
earths future.
Traveling
to the past is a whole different story, but professor Greene
says it is perhaps possible. But if it is possible, where are
all those people from the future visiting us here in the past?
The time
machines that some physicists have suggested all have the following
very important property; you can never travel to the past of
the date at which the first time machine was constructed.
At somethingyoushouldknow.net,
I'm Mike Carruthers and that's Something You Should Know.
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