The Cosmic Ruins' Original Era: A History of the Earthly Age

The History of Earth: A Chronicle of the Primordial Universe, also known as The Sequel to The Primordial Universe, is an independent title, not a derivative work. Based on the chronology system of the main work, it shifts from the main work's purely cosmic perspective to a grounded, Earth-centered viewpoint. Earth itself remains the central subject.

This work picks up from the space-time coordinate of Cosmic Calendar 97, where the main work, The Primordial Universe, ends. It builds on the foundational format of the pioneering work in the document-style genre, The Spy's Shadow Stirs the Tide: The Story of A Ai. It continues the main work's title structure, branching into three formats, from largest to smallest: Main Text, Supplementary Entries, and Brief Entries.

The main text's titles chronicle Earth's own evolution in chronological order according to the Cosmic Calendar. Supplementary Entry titles provide an overview of the life forms of each geological era on Earth. Brief Entry titles list, one by one, the names of every individual life form in each category.

Earth's prehistoric life forms number in the tens of thousands, countless in all, even more numerous than the names of all celestial bodies in the cosmic void. For one thing, the original author's lifespan is limited. For another, the work would turn from an unsolvable, cryptic tome into an encyclopedia. The sequel continues the main work.

1 Cosmic Calendar year = 100 million Earth years. A decimal point after a large number represents ten million years. The more decimal places after the large number, the smaller the time interval and the closer it is to the present day.