This square-based pyramid, like most pyramids, has been thought to have just four triangular faces. However, in a surprising turn, recent studies have shown that the one of the Seven Wonders of ...

"The Great Pyramid at Giza is known to have an amazing character of concavity that each of its four faces is slightly ...

"In other words, the Great Pyramid is a concave octagonal pyramid, rather than the standard square pyramid," he added. This intriguing characteristic of the Great Pyramid has fascinated experts ...