Haveyoueverwonderedhowbridgesdon'tfalldownorhowreallyoldbuildingsstaystandingup?IntheHowDoseries,readersarewelcometoguessalongwiththerestofus--andthenexplorethesciencebehindtherightanswers.Basicprinciplesofarchitectureandengineering,includinganintroductiontobridges,locks,arches,columns,andskyscrapersareexploredthroughdiagrams,photos,andinformativeandengagingtext.