Ark
Stephen Baxter
 In 2031, the rising sea levels have inundated most of the Pacific and Atlantic coasts of North America and the flood waters have risen as far north as Kentucky, causing an influx of internally displaced persons. For the moment, Denver and most of Colorado are safe from harm, and has become the new capital of the United States. Although civil war is brewing with separatist Utah over control of untainted fresh water supplies and former Interstate Highway System roads. Affluent inhabitants of the United States and remaining elements of NASA have funded a desperate and far-fetched get-away plan called 'Nimrod'; to ensure the continued survival of the human race, they construct a massive interstellar spacecraft from conjoined and modified Ares rockets, Saturn hardware, and Space shuttle components that is capable of superluminal travel using the Alcubierre drive, and is christened as 'Ark One'. The plan is that the children and descendants of those who built the ship will travel to a neighboring earth-like exosolar planet to start civilization anew, given that shortly before the onset of the Flood, SETI technology had advanced to the point where it could detect potentially habitable worlds in other planetary systems. The main character, Holle Groundwater, is the daughter of one affluent man, Patrick, who were first introduced to the project by Jerzy Glemp, a former Polish millionaire; his shy but intellectually gifted son, Zane, becomes Holly's best friend as he helps her progress through the project's elite scientific education program to become a candidate for one of the ship's many specific functions each person must contribute, with her specializing in spacecraft life support and Zane as the Ark's warp drive specialist. Other candidates are introduced and excluded due to the brutal training regime of the project, for the candidates in question are required to have specialized fields of knowledge for either the ship's function and/or for preservation of mankind's history, knowledge, and culture; and to create a secular-minded crew with a diverse gene pool to breed. Kelly Kenzie becomes the designated mission leader during the first phases of the mission, Wilson Argent is her sometime partner who succeeds her as mission commander later in the book; and with Venus Jenning is the Ark's celestial navigator. As noted above, there is some overlap between the earlier novel in this trilogy and its successor - aging astronaut Gordo Alonzo and Thandie Jones, the bisexual oceanographer from Flood, appear as influential characters, and Grace Gray is also a pivotal character, as is her daughter Helen, who is born on the Ark en route to its initial interstellar destination. During the 2030s, President Linda Vasquez serves four terms of office under the crisis conditions and the remnants of the federal government and armed forces take over control of the Nimrod Project. During that time, experimental use of antimatter propulsion results in several tragedies and triumphs, all the while the floodwaters rise inexorably. By 2041, the Ark is ready to be launched, although a relentless selection process has reduced the number of potential candidates to eighty in number. On the day of the launch, desperate civilians and military personnel escaping the approaching floodwaters attempt to storm the Ark, resulting in a hurried evacuation of the candidates to the starship in question. The chaotic launch is successful, but causes fatal irradiation of the surrounding area, owing to the use of nuclear fission– powered thruster technology (derived from Project Orion (nuclear propulsion) of the 1960s). Once the Ark has left Earth orbit to get under way, the crew find that they have inadvertently left some prior designated candidates behind, and some of the security personnel make a failed attempt at mutiny to find a new life shipboard. In addition, some of the female candidates are pregnant and give birth to children who become a shipboard generation. By 2042, they have harvested enough antimatter from Jupiter's magnetosphere to propel their warp drive starship to 82 Eridani's planetary system, twenty-one light-years from the Sol System, which is reached nine years later. By that time, most of Earth now lies underwater and Mount Everest is calculated to become submerged in 2052. However, problems arise, due to the nature of the targeted planet, designated "Earth II." Although 82 Eridani is a yellow G5 star, it turns out that the 'earthlike' world in question is on the fringe of its planetary system ecosphere and the prospects of prolonged extremes of temperature are further worsened by a high axial tilt relative to the system's ecliptic (rather like that of Uranus in our own solar system). (This planetary configuration, called "Urania", is used by Baxter in his story "Grey Earth". It is ultimately derived from a book called What If the Moon Didn't Exist?.) There is debate and in-fighting over what to do next, but the crew come to an agreement as Zane proposes to split the ship and crew up. One colonizes Earth II, while another led by Kelly travels back to Earth in one of Ark One's twin hulls, Seba, making planetfall in 2059. A third faction with Holly, Wilson, Grace, Venus, and Zane takes the ship's other hull, Halivah, and takes a further thirty years to travel outward to an (unnamed) M6 red dwarf star and its super-earth terrestrial world, designated "Earth III" and situated 111 light years from Earth, within Lepus (constellation). Unfortunately, generational tensions arise between the rebellious youth born on the ship and the original crew, with Wilson forming a gang-like leadership breeding with the majority of the females on board. Things are further worsened by Zane's dissociative identity disorder which he slowly developed from sexual and psychological abuse earlier in the book from his overbearing father; his fragmented pessimist personalities preach to the younger crew and make them disillusioned of the idea that they are all enclosed and observed from the 'outside world' in a simulated bio-sphere environment as a social experiment. Eventually this all leads to further mutiny as the younger crew try to break out of the ship, which consequently results in ship-wide explosive decompression that inflicts a large loss of life and causes the destruction of one of the onboard shuttle-based landing craft. Once recovering from the incident, Holle forcibly takes command by reluctantly forming a dictatorship under her rule, using threats to shut off life support for those who do not partake in the maintenance of the ship's systems to keep order except for those who are too vital for the ship, as done with Zane as she orders him to be isolated and kept alive only for the purposes of keeping the warp drive functional. This act shatters the friendships of the original crew, and with no hope to help his deteriorating state of mind and being kept alone, unloved, and alive as merely a tool as he had for most of his life, Zane commits suicide. While this is occurring, the floodwaters inundate Denver, and Kelly's ex-husband Don, Gordo, and Mel, ex-Candidate and Holle's former lover make a last stand at Alma, Colorado, which was the nearest habitable area near the former starship launch site and Mission Control for the Ark before it departed from Jupiter. In the ensuing melee, Don is killed. In 2061, when Seba returns to Earth, Lily Brooke (Floods principal protagonist) has been dead for the last three years. Thandie Jones continues to survive and has links to 'Ark Two', which turns out to be a (new) and expansive seafloor settlement which taps the geothermal energy from the submerged former Yellowstone National Park's supercaldera. Kelly meets her aged father, Edward Kenzie, and her estranged son Dexter, whom she voluntarily abandoned for a place on board. Mel has also survived, but Gordo Alonzo died defending Ark Two from ID interlopers before the rising floodwaters made further interference impossible. Human genetic engineering is postulated to assist the descendants of Ark Two to adapt to their new and arduous environmental conditions. This idea ("pantropy"), used by James Blish in his story suite The Seedling Stars, is a powerful theme in almost all of Baxter's fictional series. Two years before Halivah arrives at Earth III, Venus intercepted a strong, brief signal of unknown origin, which was not repeated (similar to the Wow! signal), and it is speculated to be extraterrestrial. She keeps the knowledge of the signal to herself. In 2081, the ship arrives at Earth III which turns out to be in a close proximity to its parent star, its surface is active with volcanoes and its climate frigidly cold from the weak solar heating of the red dwarf along with one side permanently facing away from the star, but the planet is nonetheless habitable enough to support photosynthetic life and by extension, human life. With only one landing craft left after the mutiny years earlier, Holle is forced to halve the crew through a careful selection of those to colonize the planet, specifically young children who are as diverse as possible to eliminate the risk of inbreeding. Wilson is selected to go for he is the only one who could fly the shuttle despite his age, and finally Helen is selected to go to educate the young colonists for the process of building a functional colony to prosper. After a painful goodbye to her mother Grace, and to her own children, Helen and the settlers disembark. However, Holle and Venus resolve to explore the star system's other planets using small warp-jumps. The novel is left open-ended: Wilson, Helen, and the forty children on board the shuttle craft successfully land on Earth III, set foot on its surface and begin planning for rebuilding human civilization while they see the Ark for the last time before it disappears into the cosmos, suggesting that the starship has effectively become a generation ship until the rebuilt civilization of Earth III, that may not rise for decades, centuries, or even millennia to become spaceflight capable, can reunite with the descendants of the Ark. Two pendant stories have been published since in Asimov's Science Fiction: "Earth II" and "Earth III"; each deals with characters struggling with the legacy of Ark One's colonization of their world in the face of military consolidation of the planets. These seem to be the conclusions of the Flood storyline, since Baxter has written no more material in this continuity.