4 Amazing Archaeological Discoveries Spotted by Satellite

Martin Bernetti/AFP/Getty Images
Martin Bernetti/AFP/Getty Images

Since human flight was first possible, aerial archaeology has assisted researchers in uncovering previously unknown sites that are imperceptible from the ground. Today, thanks to advanced technology, remote sensing has moved higher above the Earth: Aerial archaeology is now sometimes space archaeology. By examining maps of the planet's surface taken from space, laptop-based Indiana Joneses can search vast areas for anomalies that could indicate evidence of the human past hidden for centuries. Below are four amazing archaeological discoveries spotted from space.

1. 3100 SETTLEMENTS, 1000 LOST TOMBS, AND 17 PYRAMIDS ACROSS EGYPT

Tanis ruins
Michael Lusk, Flickr // CC BY-NC 2.0

Sarah Parcak is a space archaeologist and Egyptologist who since 2003 has discovered numerous archaeological sites across Egypt, all through her computer. Parcak specializes in analyzing satellite images taken from 400 miles overhead, processing the pictures to highlight parts of the electromagnetic spectrum the naked human eye cannot see. This allows her to note anomalies that could denote archaeological sites hidden underground.

It is highly specialized work. The tiny blips on the maps would mean nothing to the uninitiated, but to Parcak they provide clues that have led her to discover the location of 17 potential pyramids, some 3100 settlements, and 1000 lost tombs across Egypt. Parcak also used remote sensing to identify the location of the lost city of Tanis, which gained notoriety when it was featured in Raiders of the Lost Ark. The network of streets and houses of Tanis are completely invisible at ground level, and yet using infrared satellite images, Parcak was able to show the massive extent of the ancient settlement.

Parcak gave a hugely popular TED talk on space archaeology in 2012, and in 2015 was awarded the 2016 $1 million TED prize. She's used the money to create the citizen science platform GlobalXplorer, which allows anyone to analyze images from space in order to discover more lost archaeological sites across the globe—and spot evidence of looters.

2. THE FINAL DAYS OF THE MAYAN CIVILIZATION

Temple IV in Tikal mayan ruins
Guillén Pérez, Flickr // CC BY-ND 2.0

The heavily forested Petén region of northern Guatemala is home to some of the most important Maya ruins in Central America, including Tikal. Archaeologists have been working with NASA using remote sensing to examine the Petén jungle from space in the hope of identifying lost sites associated with the Maya, whose culture reached the height of its power and influence from the 7th to the 9th centuries—and then collapsed around the turn of the 10th century.

In order to gain a greater understanding of this collapse, Tom Sever, the first archaeologist to work for NASA, has been analyzing images taken from an agency satellite program known as SERVIR which was launched from Marshall Space Flight Center in Huntsville, Alabama in 2005. Sever has used the images to further his theory—one also promoted by Jared Diamond in his popular book Collapse but not accepted by all Maya scholars—that what brought down the Maya was self-induced ecological disaster. The images indicate that the Maya used slash-and-burn agricultural practices that led to severe deforestation. They also drained the wetlands known as bajos, as evidenced by images of ancient drains, causing drought and resulting in an increase in temperature. The fate of the Maya is now often held up as a prime example of the risk of deforestation and climate change.

3. HOW AND WHERE THE EASTER ISLAND MOAI WERE MOVED

moaisin the hillside of the Rano Raraku volcano in Easter Island
Martin Bernetti/AFP/Getty Images

The iconic statues on Easter Island have fascinated archaeologists since they were first noted by a Dutch explorer in 1722. But the biggest mystery is how the Rapa Nui managed to transport these enormous monoliths from the quarries where they were made to numerous sites across the island without the help of large animals or cranes.

In 2012, Carl Lipo of California State University and Terry Hunt of the University of Hawaii used satellite imagery to trace the ancient path of the stones from the quarry to various points around the island, identifying seven major roads [PDF]. The discovery of these routes led Lipo and Hunt to suggest that the upright statues might have been “walked” to their destinations, using ropes to tilt and turn the monoliths into motion. To test out their theory, the National Geographic Society’s Expeditions Council funded an experiment in which a concrete 10-foot, 5-ton copy of a moai was constructed. Using strong ropes, 18 people were able to fairly easily walk the massive statue a few hundred yards.

4. THE LOST CITY OF IRAM/UBAR

the lost city of ubar ruins

Five thousand years ago, a grand city in the deserts of Oman formed the center of the valuable frankincense trade. Known as Iram or Ubar, the legendary city was mentioned in both the Koran and The Thousand and One Nights (a.k.a. The Arabian Nights). Yet no modern trace of this once great city could be found. Notable explorer T. E. Lawrence ("Lawrence of Arabia") referred to it as “the Atlantis of the sands,” and some historians began to doubt it had ever existed. The mystery of the lost city was sufficiently tantalizing to attract the notice of NASA, who agreed to scan the area with a shuttle radar system after being approached by filmmaker and explorer Nicholas Clapp.

A Challenger space mission in 1984 provided the perfect opportunity to scan the desert of Oman from space, searching for geological features hiding under the sand. The resultant pictures revealed ancient caravan routes, which would have been packed down over hundreds of years by the camel trains traveling between trade hubs, the intersections of these roads providing clues as to potential locations for a city. Using this information, archaeologists began to dig at promising locations, and in 1991 Clapp and his team uncovered a many-towered fortress (like that described in the Koran), which would have been the home of the king and hub for the storage of frankincense. This led them to believe that they had finally uncovered the lost city of Ubar.

Ancient sources claimed that the city had disappeared into the Earth after its citizens angered Allah with their lavish and sinful way of life. Evidence from the site in Oman suggests that the destruction of the city occurred due to the appearance of a giant sinkhole, explaining how this once great city was lost to the sands.

Laser Scans Detect Hidden Buildings and Tunnels Beneath Alcatraz Prison

iStock.com/f8grapher
iStock.com/f8grapher

Isolated in the San Francisco Bay and surrounded by steep cliff faces, Alcatraz Federal Penitentiary seemed like the most secure place to keep dangerous criminals in the mid-20th century. But it's recently come to light that every inmate on Alcatraz Island lived above a series of potential escape routes that predated the prison's construction, the San Francisco Chronicle reports.

In a new study published in the journal Near Surface Geophysics, archaeologists reported their discovery of structures and artifacts beneath the Alcatraz prison yard, including underground buildings, tunnels, and ammunition magazines. Guided by historical maps, documents, and photographs, they used laser scanning technology and ground-penetrating radar to locate the subterranean fortress close to the surface.

The site dates back to the mid-19th century, when Alcatraz Island was used for military purposes. The same natural features that would later make Alcatraz an appealing prison also made it an ideal coastal fortification. Enough brick buildings were built there to house 200 soldiers and enough food was shipped in to feed them for four months.

But the fortification wasn't used for its original purpose for very long. It was transformed into the West Coast's official military prison during the Civil War, and in the 1930s, the government turned it into a federal prison. Instead of tearing down the forts and tunnels leftover from its military days, workers left them intact and built over them to save money. Archaeologists plan to investigate the underground structures further without disturbing the historic site.

Alcatraz Prison closed in 1963, so the underground tunnels no longer pose a security problem. Today the island is part of the U.S. National Park Service and is a popular tourist attraction.

[h/t San Fransisco Chronicle]

The Site Where Julius Caesar Was Assassinated Will Open to the Public in 2021

iStock.com/Largo di Torre Argentina
iStock.com/Largo di Torre Argentina

Besides being a sanctuary for stray cats, Largo di Torre Argentina in Rome is best known as the place where Julius Caesar was stabbed 22 times by assassins in 44 BCE. As the city's oldest open-air square, the spot is an important piece of Roman history, but it's fallen into disrepair. Now, Condé Nast Traveler reports that Largo di Torre Argentina will reopen to the public following a $1.1 million restoration project.

The site includes four ancient temples, a medieval brick tower, and the ruins of the senate house where Caesar was murdered. About 20 feet below street level, it was excavated under the rule of Benito Mussolini in the 1920s, and has remained largely closed to the public since. Today, Largo di Torre Argentina is overgrown and accessible only to the feral cats that live there.

On Monday, February 25, Rome mayor Virginia Raggi announced that Largo di Torre Argentina will reopen in the second half of 2021. To get the site ready for the public, the city will add restrooms, install lights, and build walkways that allow visitors to explore the area. Stone ruins, some of which are stacked into piles, will be secured, and artifacts currently sitting in storage will be moved to a museum. The one area the project will avoid is the corner where the cat sanctuary is located.

Rome, of course, is filled with ancient ruins—some that residents weren't even aware of until recently. In 2014, a 2000-year-old Roman road was unearthed during the construction of a McDonald's.

[h/t Condé Nast Traveler]

SECTIONS

arrow
LIVE SMARTER