This chemistry wordoku looks at how space spores brought life on Earth!
Solve this wordoku in the same way as a sudoku with letters instead of numbers (each of the nine letters in each row, column and nine-square cell). Once solved, one of the overall diagonals can be rearranged to give the jumbled surname of a Nobel prize-winning chemist who first expounded a fundamental hypothesis in the German journal Die Umschau.
This week’s letters are: A E H I N P R S U





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