• An Egyptologist found a passageway in a pyramid almost 200 years ago. 
  • The pyramid is badly damaged, and it was difficult to fully excavate.
  • Recently, researchers used Lidar to map the pyramid's interior and found previously hidden rooms
In 1836, Egyptologist John Shae Perring was excavating the Pyramid of Sahure (also known as Sahura) when he noticed a debris-filled passageway.