A minior plot point of "The Light of other days" by Baxter and Clarke was an earth civilization 3 billion years ago which was destroyed by an asteroid hitting e

A minior plot point of "The Light of other days" by Baxter and Clarke was an earth civilization 3 billion years ago which was destroyed by an asteroid hitting earth that wiped the surface clean. https://en.wikipedia.org/wiki/The_Light_of_Other_Days https://en.wikipedia.org/wiki/The_Light_of_Other_Days