The question of who built the pyramids, and how, has long been debated by Egyptologists and historians. Standing at the base of the pyramids at Giza it is hard to believe that any of these enormous ...

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.

Gunung Padang is an Indonesian pyramid that sits on top of an ancient volcano and could show evidence of Ice Age humans possessing advanced technology. Since the 1980s, a number of in-depth surveys ...