‘He won’t get much deader than this,’ he observed, then shoved Smith away to send him drifting across the room.

What now? Hannah had asked. When Saul had fired up the Mars Traveller engine, his decision to fling the Argus Station away from Earth had been founded on the notion that his human self would want to survive. Now, by allowing human emotions to emerge, his reason for going to Mars was obvious: his sister was there. But wouldn’t the moral choice now be to first neutralize Messina and the remaining delegates, then return to Earth to do whatever possible to mitigate the impending horror there? Quite simply, he did not know the answer, for he could do little to avert the catastrophe, and he wondered if he really wanted to set himself up as some kind of arbiter over it. The human race had walked blindly into this disaster, so it was theirs to deal with, wasn’t it?

‘I can see more of the station now,’ he informed Hannah, as the doors swept open ahead of him. ‘It possesses enough fusion plants and enough raw materials and equipment to continue functioning for a century or more without any need of the sun.’

‘What about food?’ asked Hannah, following him out into the corridor beyond.

‘The Arboretum and zero-gravity hydroponics can provide enough food for all those presently on board, and because they sent nearly the entire library from Gene Bank up here, along with tonnes of frozen samples, there’s enough biodiversity available to iron out any instabilities occurring in the ecology.’ He shot her a glance. ‘Arcoplex Two is full of state-of-the-art technology, including the necessary biotech to turn any of those samples into something living. We could resurrect whole species here that Earth hasn’t seen for centuries, or even millennia.’

‘But we’re not going back to Earth.’

Saul paused as he mentally riffled through the inventory of the equipment, laboratories and technologies contained in Arcoplex Two. There he discerned a laboratory and surgery even more advanced than the one Hannah had been using down on Earth, along with hundreds of copies of the hardware that had ended up inside both Malden’s and Smith’s skulls. No doubt this had all been laid on for Messina and his core delegates, so they could elevate themselves to a state of post-humanity. But, as Saul well knew, such equipment could provide a two-way street; what could expand the mind could also be used to scrub it, to totally erase it. He felt that thought for future reference; a viable alternative to death. And, when the time seemed right, he would let Hannah know that this alternative existed.

‘If we went back to Earth, what could I do?’ he asked.

‘You could . . . save people.’