A team of researchers has successfully built a strange four-faced pyramid named Bille that always lands on the same face—no ...

The inverted pyramid and trapezoid have a lot in common — just as those two stories do. The news comes first. Why readers should care is high up. How they did it is in the middle.

ST. PETERSBURG — A new engineering study delivers good news to those who have fought to save the inverted pyramid and to the design teams planning to reuse the iconic structure in the city's ...