The arches’ structure, the authors say, also resembles the modern vertebrates’ pharyngeal skeletons—which develops from three embryonic germ layers and neural crest cells—and provide important details ...

Arch bridges are one of the oldest types of ... the stones in the rest of the structure stay together by the sheer force of their own weight. The New River bridge Today materials like steel ...

Public ceremonies, lavish processions, and temporary wooden arches were commonplace after victory in Ancient Rome. But during the height of its power, the emperor decided to change that and leave a ...

while high arches indicate independence and intellectual curiosity. This fascinating exploration of foot structure reveals whether you may lean toward group activities or solitary pursuits ...

while the arches remained. Ibsix’s Gabriel Iglesias suggests that it won’t be gone for long, however. The theory is that they too were never intended to be a permanent structure, and so were ...

Centering under construction Constructing an arch bridge can be tricky, since the structure is completely unstable until the two spans meet in the middle. One technique is to build elaborate ...