The iconic pyramid with an eye on top of it has been a long-standing source of speculation on the one dollar bill. It's a part of the United States' many traditions steeped in history and lore.

It shows an eye, often surrounded by rays of light, enclosed by a triangle. Artists used it to represent the all-seeing eye of God. The three points of the triangle represent the Christian ...

In 1940, people first started to notice there could be more to the Great Pyramid's outer layer than first met the eye. British Egyptologist Flinders Petrie looked at a set of publications on ...