Hints for ERA #28

Difficulty: Medium

Spoiler-safe hints for the ERA puzzle of October 18, 2026. Each hint is hidden until you open it; the answer stays hidden until you ask for it.

Hint 1

The oldest event is: The Count of Monte Cristo.

Hint 2

The most recent event is: Apollo 7.

Hint 3

The Jungle Book happened in 1894.

The answer

Contains the answer. Open only if you are stuck.

  1. 1844The Count of Monte Cristo · Book
  2. 1862Russian State Library · Opened
  3. 1894The Jungle Book · Book
  4. 1927Uncertainty principle · Discovery
  5. 1948National Diet Library · Opened
  6. 1968Apollo 7 · Spaceflight

Play this puzzle Today's hints Archive

ERA

Six events from history — battles, books, inventions, treaties, spaceflights — shuffled. Put them oldest to newest in four tries. The same puzzle for everyone, in every language.