the Step Pyramid was an experimental structure that is believed to have started out as a mastaba (a flat tomb) and was built up, so it remains unclear exactly what its internal features were ...

At 146.5 m (481 ft) high, the Great Pyramid stood as the tallest structure in the world for more than 4,000 years. Today it stands at 137 m (449.5 ft) high, having lost 9.5 m (31 ft) from the top.

Builders of Egypt’s oldest known pyramid, the nearly 4,700-year-old Step Pyramid of Djoser at Saqqara, may have used waterpower to help construct this monumental structure. Ancient architects ...

The Aurora Pyramid of Hope collection contains several diamonds that do this. Brown diamonds are caused by the crystal becoming deformed. Their internal structure is warped, creating tiny holes which ...