Chrono #39 — the timeline
The seven events from November 8, 2026 in order, with their years, the gaps between them, and where each card belonged as it was dealt.
The timeline
| Year | Event | Subject | To the next |
|---|---|---|---|
| 1787 | The US Constitution is written in Philadelphia | US history | 4 years |
| 1791 | The Bill of Rights is ratified | US history | 5 years |
| 1796 | Edward Jenner tests his smallpox vaccine on a boy (the starting event) | Science & discovery | 5 years |
| 1801 | Ceres, the first asteroid, is discovered | Science & discovery | 3 years |
| 1804 | Richard Trevithick's locomotive hauls the first train on rails | Inventions & technology | 11 years |
| 1815 | The Battle of Waterloo | World history | 5 years |
| 1820 | The Missouri Compromise | US history | — |
The closest call: Ceres, the first asteroid, is discovered (1801) and Richard Trevithick's locomotive hauls the first train on rails (1804), 3 years apart — the pair most easily put the wrong way round. The widest gap: 11 years, between Richard Trevithick's locomotive hauls the first train on rails and The Battle of Waterloo.
Card by card
The line started with Edward Jenner tests his smallpox vaccine on a boy (1796). The six cards came out in this order — each the one with the most room around it among those left, so the early ones are footholds and the last are the squeeze.
- The Missouri Compromise — 1820. One of 2 gaps: it belonged after Edward Jenner tests his smallpox vaccine on a boy (1796).
- The US Constitution is written in Philadelphia — 1787. One of 3 gaps: it belonged before Edward Jenner tests his smallpox vaccine on a boy (1796).
- Richard Trevithick's locomotive hauls the first train on rails — 1804. One of 4 gaps: it belonged between Edward Jenner tests his smallpox vaccine on a boy (1796) and The Missouri Compromise (1820), 24 years apart.
- The Battle of Waterloo — 1815. One of 5 gaps: it belonged between Richard Trevithick's locomotive hauls the first train on rails (1804) and The Missouri Compromise (1820), 16 years apart.
- The Bill of Rights is ratified — 1791. One of 6 gaps: it belonged between The US Constitution is written in Philadelphia (1787) and Edward Jenner tests his smallpox vaccine on a boy (1796), 9 years apart.
- Ceres, the first asteroid, is discovered — 1801. One of 7 gaps: it belonged between Edward Jenner tests his smallpox vaccine on a boy (1796) and Richard Trevithick's locomotive hauls the first train on rails (1804), 8 years apart.
Previous: Chrono #38 (Sat, Nov 7) · Next: Chrono #40 (Mon, Nov 9) · All Chrono solutions
About Chrono
Chrono is Noggin’s timeline puzzle, on the second shelf: events dealt one at a time into a growing line, six cards a day, outside the daily line-up. How to play Chrono, or play today’s.