Wander through the words
Mastermind 11: Laws of Nature is a hard English-language crossword with 12 clues. Physics, chemistry and biology at the edge of general scientific literacy.
12 × 12 grid. Free guest play, with no download.
Use Help for a clue nudge and Check word to check your selected answer. Finish the crossword to challenge a friend on the same puzzle.
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Linguistics, word formation and the hidden machinery of language.
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Thinkers whose arguments reshaped philosophy, politics, science and society.
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Mathematical ideas, famous names and structures that reward precise thinking.
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5 more keys to your next treasure chest.
