Watch as a heavy-duty bulldozer blade gets a full restoration — from worn-out metal to a powerful tool ready for work again. A detailed look at real repair craftsmanship.

It doesn't matter how skilled you are, your power saw won't cut anything if the blades are worn. Here's how to tell when to ...

The “3.5% rule” refers to the claim that no government has withstood a challenge of 3.5% of their population mobilized against it during a peak event. In this brief paper, author Erica Chenoweth ...