A duck's quack doesn't echo, and no one knows why. That is why your TV set has channels 2 and up, but no channel 1. The shape of plant collenchyma cells and the shape of the bubbles in beer foam are the same - they are orthotetrachidecahedrons. The word 'pound' is abbreviated 'lb.' after the constellation 'libra' because it means 'pound' in Latin, and also 'scales'. Emus and kangaroos cannot walk backwards, and are on the Australian coat of arms for that reason.
Cats have over one hundred vocal sounds, while dogs only have about ten.
Camel's milk does not curdle. In every episode of Seinfeld there is a Superman somewhere. The United States has never lost a war in which mules were used. Hang On Sloopy is the official rock song of Ohio. The world's largest wine cask is in Heidelberg, Germany.