Scientists have used clever methods to discover a hidden hallway inside the Great Pyramid of Giza in Egypt. The 9-meter-long hallway could lead to new discoveries about the pyramid.
The Great Pyramid of Giza is the largest of three pyramids near Giza, Egypt. It was built about 4,500 years ago by a king named Khufu. The pyramid was built as a place for Khufu to be buried (安葬).
The pyramid was sealed (密封的) until AD 820, when someone broke it open on one side. This person found three rooms, one on top of the other, inside the pyramid. The largest room was the King's Chamber. Below that was the Queen's Chamber. There was another room underground.
The pyramid has a long, angled hallway, called the Grand Gallery. The Grand Gallery leads to the King's Chamber. There are also other hallways that go up and down, and a tunnel that now serves as an entrance for tourists.
But most of the pyramid has been sealed since it was built. The pyramid is believed to hold many other secrets. But scientists don't want to damage the pyramid by opening it up to learn those secrets.
Instead, since 2015, a group of scientists from around the world have been using invisible rays (不可见射线) to scan the inside of the pyramid. They call their group "ScanPyramids".
Now the ScanPyramids group has shown that there is also a hidden hallway not far from the tourist's entrance to the pyramid.
It's still not clear what the hallway and the large empty space were for. The scientists believe they may have been used to help spread out the weight of the pyramid.
The scientists plan to continue scanning the pyramid-and others, too-in the hopes of learning more.
