 Who built the Great Pyramids? How? Why? Questions many have attempted but seemingly failed to answer. Although claimed as tombs, with the different internal chambers within the largest, Khufu, named in representation of this purpose. Interestingly, Khufu, or Cheops, is the only one of the three pyramids with internal chambers. The other smaller two merely have tunnels beneath. An enigmatic box whose lid has long been lost to history lay within this enormous structure, long claimed to have been the sarcophagus of Khufu. However, although suspiciously small, no one seems to be able to explain how they got it into the chamber in the first place. It is as if the pyramid was built around as it doesn't fit through any of the known entranceways. Since the 19th century, when these chambers were first rediscovered, a tremendous amount of research, though it must be noted, always supervised by official Egyptian antiquity academics, nonetheless remarkable discoveries have at least been partially shared with the world. Most notably, Gontenbrink's door, yet the tomb of Osiris, where this once inaccessible tunnel led, was, once the media was permitted back into the location, found empty, claimed by officials as being found conveniently vacant. A room only discovered thanks to 21st century technology, according to mainstream Egyptologists, was somehow looted. However, there still lay many mysteries within this most intriguing of structures, and we would expect at least one or possibly many more, which no matter how long it takes us to rediscover them will be too big to hide. For example, although we once thought the tomb Gontenbrink discovered was inaccessible, the chamber at the top of the structure, one of considerable size, estimated at 30 square meters, is so inaccessible. It was only found with technology used to register cosmic rays. A technology usually utilized in high-energy particle physics, capable of tracking particles called muons, produced when cosmic rays strike atoms in the upper atmosphere. These incredibly sensitive detectors were first developed for use in particle accelerators, but they have also been used to gaze into the inner bowels of many geological and ancient artificial features. In December 2015, physicist Kunahiro Morishima of Nagoya University, Japan, placed detectors inside the queen's chamber to detect muons passing through the pyramid, thus any large chamber still hidden within the pyramid would be detected due to a higher register of muons than expected from denser angles. The chamber's discovery was cooperated by two other teams of physicists. All three teams observed a large void in the same location above the Grand Gallery. It was a big surprise, says Teyubi. We're really excited, he continued. The researchers say it might even be made up of two or more smaller spaces. Teyubi suggests that it could be, quote, a second Grand Gallery. It is a discovery which we are finding highly compelling.