A tetrahedron is the simplest Platonic solid. Mathematicians have now made one that’s stable only on one side, confirming a ...

How do they do it? On today’s episode, we're talking about different types of underwater construction, including cofferdams, diversions, caissons, and drilled shafts. Whether the construction site is ...

These two Medieval towers in Bologna are cool enough to rival Pisa, one of Italy's most iconic tourist destinations.