Carving holes is a great way to lighten a dome -- but the governor won't be happy with your design. Around 500 A.D., ancient engineers realized that a dome could be made of a circular ring of ...

It will take a lot of iron chains and money to keep your heavy concrete dome from collapsing. Besides, there's an easier -- and less risky -- way to build a dome this tall today. Try again!

The Pantheon in Rome has stood for nearly 2,000 years, boasting the largest unreinforced concrete dome on Earth ... their ...