Anomalies in Giza pyramid may indicate an unknown entrance

A few people and a camel are before a large Egyptian pyramid on a blue sky day.

Two voids detected on the eastern side of the Pyramid of Menkaure on Egypt's Giza plateau hint at a second, hidden entrance to the pyramid, according to a new study.

The pyramid was built during the reign of the pharaoh Menkaure (circa 2490 to 2472 B.C.). It's the last and smallest of the three pyramids built on the Giza plateau and originally stood about 213 feet (65 meters) tall. The main entrance to the pyramid is located on the northern face.