Build a time capsule
What changes when you compare the date on a source with the dates inside it?
25-40 minutes
Start with these sources
Your first move: Open the 1990 World Factbook preserved by Project Gutenberg and choose a country.
Without AI
- Record the edition year, the population estimate year, the unit, and the country description you used.
- Find a current World Bank or UNdata population series and inspect its definition and geographic scope.
- Create a then-and-now card; calculate a difference only if scope and units align, and label unresolved mismatches.
With GenAI
Bring your own AI tool and the source material. This atlas does not send your data anywhere or run an AI model.
- Supply the archived excerpt and current source table, keeping publication and observation dates separate.
- Ask AI to make a comparability checklist and draft a card with historical wording identified as historical.
- Check every date and definition yourself; retain gaps rather than accepting a seamless account of change.
A prompt to make your own
Using only the archived excerpt and current statistical records below, draft a country time-capsule card. Separate archive edition date, estimate year, current observation year, and retrieval date. Cite the supplied archive and statistical URLs. Check units, borders, and definitions before suggesting a numerical comparison. Mark missing data and unresolved differences; never fabricate numbers or interpolate a history. Treat old descriptions as historical statements, not current facts. Archived excerpt and current records: [Paste here.]
Make something: A then-and-now country card with edition dates, observation dates, and comparability notes.
Keep your footing
- The World Factbook sunset was announced February 4, 2026.
- The 1990 edition contains observations and estimates from different years.
- Borders, definitions, and revisions may prevent a direct comparison.
Why follow this question?
Why this is interesting
A source has more than one clock. There is the date it was published, the date its figures describe, and the date you encountered it. Putting those clocks on a card makes a historical comparison more honest and often more interesting.
Use the 1990 Factbook transcription as a dated archive, alongside the CIA's 2026 sunset announcement. The transcription is hosted by Project Gutenberg, not a continuing CIA data service.
Follow another thread
Compare how the sources define a place or organize a topic, even when their numbers cannot be aligned. Changes in categories and wording can open historical questions of their own. For a longer view, ask what metadata you would preserve now so a future reader could understand today's statistics without guessing what you meant.
Go a little further
Write a note for a reader in 2050 explaining which parts of your own card may become stale.