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''Neptune's Brood'' is a science fiction novel by British author Charles Stross, set in the same universe as ''Saturn's Children'', but thousands of years later and with all new characters. The novel was shortlisted for the 2014 Hugo Award for Best Novel. ==Fictional universe== The setting of ''Saturn's Children'' was the solar system. ''Homo sapiens'' was extinct, and all the characters were androids. In ''Neptune's Brood'', set in AD 7000, ''Homo sapiens'' has been resurrected three times, but it remains insignificant, and is known as the "Fragile". In the novel, "humanity" is used for the "mechanocyte"-based metahuman successor life forms, vastly improved over the original androids. The setting of ''Neptune's Brood'' is the part of the galaxy that has since been colonized with slower than light travel. A large part of the plot turns on the question of financing such colonization.〔 Money, which is entirely cryptocurrency, has been divided into three classes: "fast", "medium", "slow". Fast money is ordinary day-to-day cash, medium money is ordinary investment instruments, suitable for use within a single planetary system, and slow money is interstellar investment instruments, understood to take centuries, even a millennium, to mature. Slow money transactions rely on a three-way cryptoverification scheme, and so trade at one-third the speed of light. Two thousand years before the main plot begins, one start-up colony, Atlantis, broke contact without warning or explanation with the rest of humanity, and two attempts to physically contact them also went dark. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Neptune's Brood」の詳細全文を読む スポンサード リンク
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