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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.

Sunday, October 13, 201398AViolation of the first and second laws of thermodynamicsJeff Chen
Tuesday, August 13, 200255AMechanical impossibilityRobert Malinow
Monday, November 1, 199936AInventor's impossible goalRobert Frank
Tuesday, May 19, 199820A"Impossible" achievementWilliam S. Cotter
Saturday, September 23, 199532ANoted Paganini compositionMartin Ashwood-Smith

11 results for PERPETUALMOTION from older pre-Shortz puzzles.

Saturday, December 13, 198620AInventor's "impossible dream"Ernst TheimerMaleska
Monday, June 29, 198124AAncient scientific questChristy RidleyMaleska
Wednesday, January 24, 19792DAn impossible dreamJean J. DavisonMaleska
Saturday, March 11, 197815AInventor's dreamWilliam LutwiniakMaleska
Tuesday, May 31, 19777DAsset of an ideal machineHerb L. RisteenMaleska
Thursday, August 7, 197517AInventor's dreamBert BeamanWeng
Sunday, November 5, 1967109AInventor's dream.Bert BeamanFarrar
Saturday, March 23, 196320APhysicist's fascination.George LaczkoFarrar
Wednesday, September 13, 196120AOne of the "impossibles."UnknownFarrar
Saturday, November 29, 195817AMechanical impossibility.Jules ArensbergFarrar
Friday, September 14, 195652AMechanical mirage.Bernice GordonFarrar