I'm reading "Surely you're joking, Mr. Feynman!" which is one of the funniest and interesting books I've ever read!! However, in one paragraph, Feynman is talking with some topology students about a riddle: The topology students: "You've got an orange, OK? Now you cut the orange into a finite number of pieces, put it back together, and it's as big as the sun. True or false?" "No holes?" "No holes!" "Impossible! There ain't no such a thing." "Ha! We got him! Everybody gather around! It's So-and-so's theorem of immeasurable measure!" Just when they think they've got me, I remind them, "But you said an orange! You can't cut the orange peel any thinner than the atoms."... I understood Feynman argument, but I didn't get the idea of the theorem of immeasurable measure. How can you get an orange as big as the sun?