More than 4,500 years after it was built, the Great Pyramid of Giza is still surprising scientists. In a discovery announced ...
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 ...
However, the food pyramid was criticized for being overly vague and confusing, and was eventually replaced by MyPlate in 2011 ...