Ancient American geological formation, the Double Arch, suddenly collapsed on Wednesday ... important event,” Tariakuiri Alvarez told The US Sun. The Purépecha defeated the Aztecs and ruled ...

Reaching 630 feet into the air, it’s the tallest monument in the United States ... of the Gateway Arch. The acclaimed Finnish American architect is best known for his structures like the TWA ...

However, it was the Romans who fully embraced and refined the arch, turning it into a fundamental element of their engineering: by improving materials — especially through the development of concrete ...