Chrono #42 — the timeline
The seven events from November 11, 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 |
|---|---|---|---|
| 1897 | J.J. Thomson discovers the electron | Science & discovery | 7 years |
| 1904 | The New York City subway opens | Inventions & technology | 11 years |
| 1915 | The Lusitania is sunk | World history | 30 years |
| 1945 | The United Nations is founded | World history | 3 years |
| 1948 | The Polaroid instant camera goes on sale | Inventions & technology | 6 years |
| 1954 | Brown v. Board of Education outlaws segregated schools (the starting event) | US history | 3 years |
| 1957 | Ghana becomes independent | World history | — |
The closest call: The United Nations is founded (1945) and The Polaroid instant camera goes on sale (1948), 3 years apart — the pair most easily put the wrong way round. The widest gap: 30 years, between The Lusitania is sunk and The United Nations is founded.
Card by card
The line started with Brown v. Board of Education outlaws segregated schools (1954). 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.
- J.J. Thomson discovers the electron — 1897. One of 2 gaps: it belonged before Brown v. Board of Education outlaws segregated schools (1954).
- The Lusitania is sunk — 1915. One of 3 gaps: it belonged between J.J. Thomson discovers the electron (1897) and Brown v. Board of Education outlaws segregated schools (1954), 57 years apart.
- The United Nations is founded — 1945. One of 4 gaps: it belonged between The Lusitania is sunk (1915) and Brown v. Board of Education outlaws segregated schools (1954), 39 years apart.
- The New York City subway opens — 1904. One of 5 gaps: it belonged between J.J. Thomson discovers the electron (1897) and The Lusitania is sunk (1915), 18 years apart.
- Ghana becomes independent — 1957. One of 6 gaps: it belonged after Brown v. Board of Education outlaws segregated schools (1954).
- The Polaroid instant camera goes on sale — 1948. One of 7 gaps: it belonged between The United Nations is founded (1945) and Brown v. Board of Education outlaws segregated schools (1954), 9 years apart.
Previous: Chrono #41 (Tue, Nov 10) · Next: Chrono #43 (Thu, Nov 12) · 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.