See how Egyptian engineers might have used water to shape history’s greatest monuments.

Waterpower may have given a big lift to builders of Egypt’s oldest known pyramid, the nearly 4,700-year-old Step Pyramid of Djoser at Saqqara. Ancient architects built a hydraulic system for hoisting ...

The food pyramid was designed to offer an easy-to-understand look at healthy eating, but for the average person it's too simplistic, vague, and sometimes way off. Here's how food pyramids work and how ...