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    First stabilize the wormhole.  Then tow one mouth of the
wormhole through deep space so that it comes very close to a
...
it--perhaps  near the moon to make it easily accessible from
Earth--you would now have a reusable time machine with a set
period of time transfer involved.

sub create_time_machine {
    my $time_duration = shift;
...

# Now create time machine with desired time period
my $p = create_time_machine(1_000);  # eg. 1,000 years