https://informationisbeautiful.net/visualizations/timeline-of-the-far-future/
If titanium is breaking down at 100,000 years, how is LAGEOS going to have anything left at 8.4 million years? And won’t it melt during re-entry?
Anyway, let me pencil that in.
Seems way overoptimistic about G.R.R. Martin completing the next book within 700K years.