‘It seems there is also a direct thermal drain,’ Celedon observed.

Between the bull’s horns of the runcible, the warp turned blank white, and from it cold propagated throughout the station. Frost crystals feathered across the floor and up the walls.

‘Yes, as expected,’ Jerusalem replied.

‘Entropy?’ Celedon suggested. ‘This link to the future a definite confirmation of the universal slide into lower energy states?’

‘No, a confirmation of the vast energy requirement of this runcible link. It is already out of control, and the phenomenon is localized but dispersed. Observe the planet. Observe the sun itself.’

Celedon focused various instruments where directed. The planet, a blue sphere, was now striated with lines of red cloud. Thermal analysis revealed that its entire surface temperature had dropped one degree. In the surface of the sun, directly below where the station orbited, a black spot formed and spread.

‘Ah, hence the hostile contact protocol Starfire?’ Celedon suggested.

‘The hostile will most certainly try to keep the gate open, and certainly try to acquire the technology surrounding it. We will close this gate, severing the link, and the energy will have to go somewhere.’

‘Erm . . . how localized is this phenomenon?’

‘The radius of the sphere of influence from each runcible extends for the spacial distance between them. The energy drain drops in a near-to-straight line to zero from centre to circumference.’

Celedon could only make an estimate based on the entropic effects on nearby objects—the sun, the planet—and the result it came up with appalled it. This was why, even though AIs knew how to make a time-inconsistent runcible link, they pretended otherwise. The energy requirement increased exponentially and could not be controlled. The link drained energy directly from the space around each runcible gate, and would keep on doing so until surrounded by dead worlds and dead suns. Shutting down such a link resulted in all the absorbed energy exploding from one gate—the one still open, since it was impossible to close them both at the same instant—in the form of a blast wave of subatomic particles forced from the quantum foam. The mathematics involved was esoteric even for AIs, but they calculated that closing such a link, formed between planets ten light years apart with a time inconsistency of a year, even after only a few seconds, could result in the obliteration of one of the gate worlds, and the fatal irradiation of all life within a sphere of nearly a light year. These two gates lay 150,000 light years apart, the time-inconsistency at 830 years, and now the gate had been open for three seconds. And people came through.