Newton and the Quasi-Apple

Classic Science Fiction by the long-time editor of ANALOG.What if Newton was wrong -- or just seemed to be wrong? What if visitors from an advanced civilization accidentally made it seem as if the Three Laws of Motion didn't work as advertised -- and thus got Newton in very serious trouble with the authorities? And what if that was just the start of the trouble?

". . . . as nice a piece of work as anyone in the field has done." -- Harry Turtledove

"Science Fiction at its intriguing and thought-provoking best." -- Ben Bova