Seven cards. One hidden rule.

Catalogues puzzle 17

Solve Catalogues puzzle 17, a fixed medium list: seven cards, one hidden ordering rule, five guesses.

PUZZLE 17 · Medium

Put these in order

Eureka Moments

5 guesses left– of 7 in place0:00
  1. Röntgen discovers X-rays
  2. Fleming discovers penicillin
  3. Jenner tests a smallpox vaccine
  4. Volta announces the electric battery
  5. Copernicus publishes On the Revolutions
  6. First human heart transplant
  7. The Wright brothers fly at Kitty Hawk

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