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THE TIME TRAVELLER'S HANDBOOK 1.

From John Gribbon's new book UNVEILING THE EDGE OF TIME
(Harmony,1992):
1.	"Pick a big enough black hole, where tidal forces near the
event horizon are not too extreme, and, still without ever
crossing the event horizon, they would be able to use the
region of distorted spacetime around the hole for repeated
journeys through time - but only in one direction, into the
future." p.146

2.	"there seems to be nothing in the laws of physics that
forbids travel through wormholes. The science-fiction
writers were right - hyperspace connections do, at least in
theory, provide a means to travel to distant regions of the
Universe without spending thousands of years pottering
along through ordinary flat space at less than the speed of
light." p.152

3.	"it might indeed be possible to construct travrsable
wormholes artificially .... given a suitably advanced
technological civilization." p.173

4.	One must use negative feed back destructive gravity wave
interference stabilization to prevent the traversable
wormhole time machine fron shutting itself down by the
"blue sheet" barrier. p.174

5.	The Cal Tech consortium of Morris, Yurtsever and Thorne
"started out by constructing the mathematical description
of a geometry that described a traversable wormhole, and
then used the equations of the general theory to work out
what kinds of mattewr and energy would be associated with
such a spacetime... in order for an artificial wormhole to
be held open, its throat must be threaded by some form of
matter, or some form of field, that exerts negative
pressure and has antigravity... the kind of field,
associated with the modern version of the cosmological
constant, thought to have driven the expansion of the very
early Universe ... the negative pressure (tension) exerted
must be greater than the mass-energy density of the
original matter that makes up the black hole....
hypothetical matter that possesses this curious property is
known as 'exotic' matter." p.175

6.	Is the dark missing mass of the Universe exotic matter? It
would have to be if, indeed, the Universe is engineered by
super-intelligence quantum acting at a distance from the
future!