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16 results for PERPETUALMOTION

5 Shortz Era entries found. Click any date for context.
See the dictionary definition for perpetual motion.

Sun Oct 13, 201398AViolation of the first and second laws of thermodynamicsJeff Chen
Tue Aug 13, 200255AMechanical impossibilityRobert Malinow
Mon Nov 1, 199936AInventor's impossible goalRobert Frank
Tue May 19, 199820A"Impossible" achievementWilliam S. Cotter
Sat Sep 23, 199532ANoted Paganini compositionMartin Ashwood-Smith

11 results for PERPETUALMOTION from older pre-Shortz puzzles.

Sat Dec 13, 198620AInventor's "impossible dream"Ernst TheimerMaleska
Mon Jun 29, 198124AAncient scientific questChristy RidleyMaleska
Wed Jan 24, 19792DAn impossible dreamJean J. DavisonMaleska
Sat Mar 11, 197815AInventor's dreamWilliam LutwiniakMaleska
Tue May 31, 19777DAsset of an ideal machineHerb L. RisteenMaleska
Thu Aug 7, 197517AInventor's dreamBert BeamanWeng
Sun Nov 5, 1967109AInventor's dream.Bert BeamanFarrar
Sat Mar 23, 196320APhysicist's fascination.George LaczkoFarrar
Wed Sep 13, 196120AOne of the "impossibles."UnknownFarrar
Sat Nov 29, 195817AMechanical impossibility.Jules ArensbergFarrar
Fri Sep 14, 195652AMechanical mirage.Bernice GordonFarrar