From a digital vantage point in orbit, scientists have mapped every building on Earth—2.75 billion structures, all in 3D.

Fatal collapses ignited interest in the safety of public-occupancy temporary structures, such as stages and tents, which have long been permitted by the fire department, not the building official. The ...

A simple mathematical model has helped chemists selectively synthesise a novel interwoven catenane structure. Researchers say ...