had fled inland, a secondary tide of misery, away from the devastated coasts. Already there had been too many deaths even to count, from flooding and tsunamis and ’quakes – and there were surely many more to come, as the displaced populations succumbed to disease, and flooded-out farmers failed to return a crop, and as the wars broke out over remaining stocks.
Meanwhile, as the polar seas flexed, titanic rafts of ice broke away from the shelves of Antarctica and the glaciers of Alaska and Greenland. The larger bergs broke up in the tempestuous seas, but many of them survived to the Equator, filling the oceans, already all but impassable, with an additional hazard. And so bergs like this one were now common sights at all latitudes on the seaboards of the Atlantic and Pacific. In some places they were actually being mined to make up for the disrupted local supplies of clean fresh water. Always a silver lining, Malenfant thought sourly.
He stripped off his sweaty track suit and ran naked into the surf. Deeply mixed by the Tide with the waters of the deep ocean, the sea was icy cold and very salty, stinging when it splashed his eyes and the scar tissue on his healing arm. He took care not to go far out of his depth; he could feel a strong undercurrent as the sea drew back.
He swam a few strokes and then lay on his back, studying the sky, buoyant in the salty water.
The Red Moon was fat and swollen in the sky above him. Though it had (somehow) inserted itself into the same orbit as the old, vanished Moon, it was more than twice Luna’s diameter, as large in area as five old Moons put together – and a lot more than five times as bright, because of its reflective cloud and water.
And this morning, the Red Moon was blue. The hemisphere facing him showed a vast, island-strewn ocean, blue-black and cloud-littered, with the shining white of ice caps at the northern and southern extremes. The Red Moon’s north pole was tilted towards Earth by ten degrees or so, and Malenfant could see a huge high-pressure system sitting over the pole, a creamy swirl of cloud. But dark bands streaked around the equator, clouds of soot and smoke.
Malenfant, for all his personal animosity, admitted that the new Moon was hauntingly lovely. It even looked like a world: obviously three-dimensional, with that shading of atmosphere at the sunlit limb, and sun casting a big fat highlight on its wrinkled ocean skin, as if it were some immense bowling ball. Poor Luna had been so dust-choked that its scattered light had made it look no more spherical than a painted dinner plate.
Malenfant, understandably obsessive, had kept up with the evolving science of the Red Moon.
The new Moon turned on its axis relative to Earth – unlike departed, lamented Luna with – a ‘day’ of about thirty hours, so that Earthbound watchers were treated to views of both sides. The other hemisphere was dominated by the worldlet’s main landmass: a supercontinent, some called it, a roughly circular island-continent with a centre red as baked clay, and fringed by grey-green smears that might be forests. The Red Moon was hemispherically asymmetric, then: like Mars and Luna, unlike Earth and Venus.
That great continent was pitted by huge, heavily eroded impact craters: to Malenfant they were an oddly pleasing reminder of true, vanished Luna. And the centre of the supercontinent was marked by a single vast volcano that thrust much of the way out of the atmosphere. Its immense, shallow flanks, as seen in the telescope, were marked at successively higher altitudes by (apparent) rings of vegetation types, what appeared to be glaciers, and then by bare rock, giving it to terrestrial observers something of the look of a shooting target. (And so the commentators had called it Bullseye.)
The Red Moon’s mightiest river rose on the flanks of the Bullseye. Perhaps that great magma upwelling had lifted and broken ancient aquifers. Or perhaps air uplifted by the great mountain was squeezed dry of its water by altitude. Anyhow the river snaked languidly across a thousand miles to the eastern coast, where it cut through a mountain chain there to reach the sea at a broad delta.
There were mountains on both east and west coasts of the supercontinent. They were presumably volcanoes. Those on the east coast appeared to be dormant; they were heavily eroded, and they seemed to cast a rain shadow over the desiccated interior of the continent. There was, however, a comparatively lush belt of vegetation between the mountains and the coast. The commentators had called it the Beltway. The greenery pushed its way into the interior of the continent in a narrow strip along the valley of that great river, which was a Nile for this small world.
But the mountains on the west coast were definitely not dormant. Presumably prompted by rock tides induced by Earth’s gravity field, they had been observed to begin erupting a few days after the Red Moon’s arrival in orbit around Earth.
They must have been spectacular eruptions. Thick, dense rock near the surface appeared to have blocked the magma flows, bottling up increasing pressure before yielding explosively like a champagne cork flying out of a bottle. On Earth, such stratovolcanoes – like Mount Fuji, Mount Rainier – could eject debris miles into the air. On the Moon the volcanoes had blown debris clear of the planet altogether. Meanwhile vast quantities of dust and gases had been pumped into the atmosphere, to spread in thick bands around much of the Moon’s middle latitudes.
There was a great deal you could tell about the Red Moon, even from a quarter-million miles, with telescopes and spectrometers and radar, as the two hemispheres conveniently turned themselves up for inspection. For instance, those oceans really were water. The temperature range was right – as you’d expect since the Moon shared Earth’s orbit around the sun – and examination of the visible and infra-red spectra showed that the clouds’ caps were made of water vapour, just the right amount to have evaporated off the oceans.
The Red Moon’s surface gravity was some two-thirds Earth’s – a lot more than Luna’s, and, crucially, enough for this miniature planet to have retained all the essential ingredients of an Earthlike atmosphere: oxygen, nitrogen, carbon, water vapour, carbon dioxide – unlike poor barren Luna. So the Red Moon had water oceans and a nitrogen-oxygen atmosphere.
Already the study of the Red Moon had revolutionized the young science of planetology. With a quarter of Earth’s mass – but four times the mass of Mars, some twenty times the mass of Luna – the Red Moon was a planet in its own right, intermediate in size between the Solar System’s small and large denizens, and so a good test-bed for various theories of planetary formation and evolution.
It differed in key ways from Earth. Because it was so much smaller, it must have started its formation (wherever that had occurred) with a much smaller supply of heat energy than Earth. And that inner heat had been rapidly dissipated through its surface.
Like a shrivelled orange, the Red Moon’s rind was thick. Probably aeons ago, the tectonic plates fused, and continents no longer slid over its face. There was no continental drift, no tectonic cycling, no oceanic ridges. Unlike Earth, the Moon’s uncycled surface was very ancient; and that was why the interior of the continent bore those huge eroded craters, the scars left by immense impacts long ago.
And that was why the Bullseye was so vast. The huge shield mountain had probably formed over a fountain of magma erupting through a flaw in the crust layers. The crust beneath it must have been held in place over the flaw for hundreds of millions of years – so it more resembled Mars’s Olympus Mons than, say, Earth’s Hawaiian islands.
But there was more than geology up there. On the Red Moon, it appeared, there was life.
The air was Earthlike, containing around a sixth oxygen – a smaller proportion than Earth’s atmosphere, but difficult to explain away by non-living processes. It hadn’t taken long to establish that the green-grey pigment that stained the fringes of the supercontinent and its wider river valleys, as well as the shallower sections of the world ocean, was chlorophyll, the green of plants. There were
