What the Romans Taught Us about Concrete

What the Romans taught us about concrete could fill a fairly thick book. The Romans learned that low water content and compaction are the keys to making extremely durable structures like the Pantheon, which still stands after 2,000 years.

Who Invented the Constant Velocity Joint?

If it weren’t for this Ford engineer, riding in a car could be an unpleasant or even dangerous experience. In 1926 he invented the constant velocity joint, or CV joint. This device allows the outer wheel to steer during turns, at the same time allowing up-down motions of the suspension.