Saul had already found that time on board the spacecraft became strangely elastic in the absence of any clear evidence of day or night. Amy and Lester appeared to have run out of minor maintenance checks for either himself or Mitchell to perform and, although he had little else to do, he didn’t have the stomach to keep watching the slow march of death as it continued to spread across the face of the planet. He dozed intermittently, but both module and lander were filled with constant creaks and rattles that did little to soothe his nerves. At one point he awoke to find Mitchell zipped into a sleeping bag across the lander from him, apparently asleep. Yet Saul could see, from the way the other man’s eyes moved under their closed lids, that he was watching or reading something via his contacts.

When Saul awoke a few hours later, he unzipped himself from his bag and ventured back through to the command module. He sat down next to Amy while her husband was sleeping, securely strapped across the three rear passenger seats and apparently oblivious to the tormented rattle of metal under stress, or even to his wife’s description of endless technical details about fuel mixes and delta vees. All that she said meant little to Saul, but was oddly comforting when delivered with that effortless confidence with which she was imbued. Finally, he let his head sink back and closed his eyes, linking once more into one of the few satellite-feeds still transmitting out of Earth orbit.

Much of Brazil had already slid beneath those flickering clouds and disappeared forever. Goodbye, São Paolo, thought Saul with infinite sadness; goodbye Rio de Janeiro, rain forests and macaws. All places and things he’d never set eyes on, but now found himself missing with bottomless remorse.

He discovered a few static-ridden broadcasts still coming out from other parts of the South American continent, and listened to people who knew death was approaching them. He saw a jerky handheld video shot in Venezuela, taken within the hour, that showed black clouds like thunderheads slowly spreading outwards to choke out the sunlight, those familiar twists of light dancing high in the stratosphere.

One by one, the voices faded into the hissing static, never to be heard again, until all that was left was a single audio transmission of a man alternately praying in Spanish and weeping. Saul listened for a few moments before cutting the link, unable to bear any more of it. There was, by contrast, no news coming out of Copernicus whatsoever, and Saul remembered Amy telling him that most if not all of Copernicus’ population had already been evacuated.

‘That’s us officially past the halfway point,’ Amy informed him when Saul opened his eyes again. ‘Less than two days before we touch down.’

‘What about the VASIMRs?’