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Scientists Discover a Mysterious Void in the Great Pyramid of Giza

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The Great Pyramid of Giza, the largest in all of Egypt, was built more than 4500 years ago as the final resting place of the 4th Dynasty pharaoh Khufu (a.k.a. Cheops), who reigned from 2509 to 2483 BCE. Modern Egyptologists have been excavating and studying it for more than a century, but it's still full of mysteries that have yet to be fully solved. The latest discovery, detailed in a new paper in the journal Nature, reveals a hidden void located with the help of particle physics. This is the first time a new inner structure has been located in the pyramid since the 19th century.

The ScanPyramids project, an international endeavor launched in 2015, has been using noninvasive scanning technology like laser imaging to understand Egypt's Old Kingdom pyramids. This discovery was made using muon tomography, a technique that generates 3D images from muons, a by-product of cosmic rays that can pass through stone better than similar technology based on x-rays, like CT scans. (Muon tomography is currently used to scan shipping containers for smuggled goods and image nuclear reactor cores.)

The ScanPyramids team works inside Khufu's Pyramid
ScanPyramids

The newly discovered void is at least 100 feet long and bears a structural resemblance to the section directly below it: the pyramid's Grand Gallery, a long, 26-foot-high inner area of the pyramid that feels like a "very big cathedral at the center of the monument," as engineer and ScanPyramids co-founder Mehdi Tayoubi said in a press briefing. Its size and shape were confirmed by three different muon tomography techniques.

They aren't sure what it would have been used for yet or why it exists, or even if it's one structure or multiple structures together. It could be a horizontal structure, or it could have an incline. In short, there's a lot more to learn about it.

In the past few years, technology has allowed researchers to access parts of the Great Pyramid never seen before. Several robots sent into the tunnels since the '90s have brought back images of previously unseen areas. Almost immediately after starting to examine the Great Pyramid with thermal imaging in 2015, the researchers discovered that some of the limestone structure was hotter than other parts, indicating internal air currents moving through hidden chambers. In 2016, muon imaging indicated that there was at least one previously unknown void near the north face of Khufu's pyramid, though the researchers couldn't identify where exactly it was or what it looked like. Now, we know its basic structure.

A rendering shows internal chambers within the Great Pyramid and the approximate structure of the newly discovered void.
ScanPyramids

"These results constitute a breakthrough for the understanding of Khufu's Pyramid and its internal structure," the ScanPyramids team writes in Nature. "While there is currently no information about the role of this void, these findings show how modern particle physics can shed new light on the world's archaeological heritage."

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Stones, Bones, and Wrecks
Take a Closer Look at the $17 Billion 'Holy Grail of Shipwrecks'

Feast your eyes on these new images of the treasure among the wreckage of the Spanish ship San José, often called the "holy grail of shipwrecks." When it sank on June 8, 1708, it was carrying gold, silver, jewels, and other precious cargo worth roughly $17 billion today. Now, Woods Hole Oceanographic Institution (WHOI) is revealing the major role it played in the 2015 expedition to find the San José.

The three-masted, 62-gun Spanish galleon exploded and sank at the hands of the British during the War of the Spanish Succession. It was carrying its riches to the Colombian city of Cartegena to finance the war. Archaeologists had been trying to find the San José for decades before it was finally located on November 27, 2015, during an expedition organized by Colombia, Maritime Archaeology Consultants (MAC), and WHOI. The multibillion-dollar treasure, which still sits nearly 2000 feet below the surface of the ocean near Cartegena, is just now being revealed.

WHOI's autonomous underwater vehicle REMUS 6000 was responsible for finding the elusive wreck. REMUS has been with the project since the beginning: The machine created the first side-scan sonar images of the site. After that, REMUS journeyed to a point 30 feet above the site and captured high-resolution photos of the ship's distinctive bronze cannons, which are engraved with dolphins. REMUS's documentation of this defining feature allowed scientists to positively identify the wreck as the fabled San José. (Thanks to whoever had the idea to put dolphins on the cannon in the first place.)

WHOI also released REMUS's photos of the wreckage, which show details of the horde, including ceramics and those famous cannons. "This constitutes one of the greatest—if not the biggest, as some say—discoveries of submerged patrimony in the history of mankind,” Colombian president Juan Manuel Santos said back when the treasure was discovered.

The San José's treasure is the subject of a legal battle for ownership between Colombia and U.S. salvage company Sea Search Armada, which helped look for the wreck. In 2011, four years before the San José was even found, the court ruled that the booty belongs to Colombia, but the dispute is ongoing. Because of the legal drama, the exact location of the wreck remains a government secret.

Below, check out the newly released pictures for a closer look at cannons, teacups, and other ceramics.

cannons from the San Jose
Woods Hole Oceanographic Institution

pots from the San Jose
Woods Hole Oceanographic Institution

teacups from the San Jose
Woods Hole Oceanographic Institution

REMUS 6000
REMUS 6000
Mike Purcell, Woods Hole Oceanographic Institution


A mosaic of images taken by the REMUS 6000 depicts the whole site.
A mosaic of images taken by the REMUS 6000 depicts the whole site.
Jeff Kaeli, Woods Hole Oceanographic Institution

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Stones, Bones, and Wrecks
Researchers Accidentally Discover 128-Year-Old Shipwreck
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Scientists conducting a routine survey of the waters along Australia's east coast got more than they bargained for when they accidentally discovered a 128-year-old shipwreck.

Their encounter with the sunken Carlisle, which sank in 1890, was captured on camera, and Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) has released footage showing an aerial view of the wreckage, teeming with schools of fish.

The researchers were mapping the seafloor of Bass Strait, which separates mainland Australia from the island of Tasmania, to improve nautical charts for the major shipping route, according to Mashable. During a scan of the waters, the sunken ship showed up as a "blip," ABC reports.

"We just happened to go over this blip, and we noticed it, and thought, 'Oh jeez, that looks just a little too much like a shipwreck,' and so we did a little bit more investigating and looked at it digitally," CSIRO hydrographer Matt Boyd told ABC. "Then once we established that yes, it was a shipwreck, we put a drop camera down."

Volunteers from the Maritime Archaeological Association of Victoria then went to the site and confirmed that the ship was indeed the Carlisle. It most likely collided with rocks while sailing from Melbourne to Newcastle, where it was supposed to pick up coal on its way to South America. All 23 crew members survived, escaping on three life boats.

The researchers discovered two more shipwrecks during a weeklong expedition from Brisbane to Hobart, one of which was identified as the HMAS Pioneer, a ship built for the British Royal Navy in 1900 that was scuttled in 1931.

[h/t ABC]

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