      The Great Pyramids used to be as white as snow because they were encased in a bright limestone that has worn off over the years.       There are six million parts in the Boeing 747-400.       The typical lead pencil can draw a line that is thirty five miles long.       The word “toy” comes from an old English word that means “tool.”       Smokers are twice as likely to develop lower back pain than non-smokers.       A chicken with red earlobes will produce brown eggs, and a chicken with white earlobes will produce white eggs.       Seniors who drink a cup of coffee before a memory test score higher than those who drink a cup of decaffeinated coffee.       |