Final Jeopardy today delivered a classic science stumper on Jeopardy . The October 17, 2025, episode (Season 42, Game 30) featured Dargan Ware, Sondra Venable, and returning champion Cindy del Rosario, with the round’s clue pointing straight at Wolfgang Pauli’s most famous 1930 hypothesis. The correct response was “neutrino,” and only one player converted at the end.

Today’s Final Jeopardy (Category: 20th Century Science)

Clue: “Calling it ‘a particle that cannot be detected’, physicist Wolfgang Pauli 1st proposed this in 1930; it was detected in 1956.”

Correct response: “What is the neutrino?”

Pauli’s 1930 idea filled in the energy-accounting gap in beta decay; the experimental confirmation came in 1956 with the Cowan–Reines neutrino experiment. (Frederick Reines later received th

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