Mapping Technology Reveals 'Lost Cities' on National Geographic

Lin uses his iPad to visualize scanning data of a crusaders' fortress at the lagoon in Acre, Israel.
Lin uses his iPad to visualize scanning data of a crusaders' fortress at the lagoon in Acre, Israel.
Blakeway Productions/National Geographic

Imagine what Pompeii looked like before the lava hit, or Mayan pyramids before the jungle took over. In the past decade, scientists have been able to explore human settlements long since abandoned by using a new wave of accessible technology. Instead of needing an expensive plane and crew to fly aerial sensors, for example, explorers can mount them on cheaper drones and pilot them into previously unreachable areas. The resulting data can tell us more about the past, and the future, than ever before.

That’s the premise of Lost Cities with Albert Lin, a new TV series premiering on National Geographic on Sunday, October 20.

Lin, an engineer and National Geographic Explorer, uses cutting-edge tools to shed light on centuries-old cities in the most beautiful places on Earth. Ground-penetrating radar reveals buried structures without disturbing the landscape. A drone-mounted remote sensing method called LIDAR—short for "Light Detection and Ranging"—shoots lasers at objects to generate data, which Lin visualizes with 3D mapping software. The results suggest what the ruins probably looked like when they were new.

Thomas Hardy, Adan Choqque Arce, Joseph Steel, Duncan Lees, Albert Lin, and Alonso Arroyo launch the LIDAR drone at Wat'a in Peru.National Geographic

“It’s like a window into a world that we’ve never had before,” Lin tells Mental Floss. “It’s shooting millions of laser pulses per second through a distance of air. By digitally removing the top layer of everything above the ground—trees, brush, cacti—you’re washing away the past. All of the sudden you’re left with these fingerprints—experiments in how we organized ourselves through time.”

For the six-episode series, Lin and the expert storytelling team were dispatched to the South Pacific, the Middle East, the Andes, the Arctic, and other destinations. Lin explains that while most of the sites are known to archaeologists, they’ve never been so precisely mapped in three-dimensional detail.

In the first episode, Lin travels to Nan Madol, an enigmatic complex of temples and other structures on the Micronesian island of Pohnpei. With the help of local researchers and indigenous leaders, Lin and the team scan the ruins and digitally erase trees, water, and forest undergrowth to unveil the complex's former grandeur.

“Technology and innovation have always been that gateway to go beyond the threshold, and see what’s around the corner,” Lin says. “Seeing these worlds for the first time since they were left, it’s almost like reversing the burning of the library of Alexandria. We can take the synthesis of knowledge of all these watershed moments of our human journey, and imagine a better future.”

Lost Cities With Albert Lin premieres Sunday, October 20 at 10/9c and resumes on Monday, October 21 at 10/9c on National Geographic.

Thursday’s Best Amazon Deals Include Guitar Kits, Memory-Foam Pillows, and Smartwatches

Amazon
Amazon
As a recurring feature, our team combs the web and shares some amazing Amazon deals we’ve turned up. Here’s what caught our eye today, December 3. Mental Floss has affiliate relationships with certain retailers, including Amazon, and may receive a small percentage of any sale. But we only get commission on items you buy and don’t return, so we’re only happy if you’re happy. Good luck deal hunting!

Archaeologists Discover the Jousting Yard Where Henry VIII Had His Historic Accident

National Trust, Wikimedia Commons // Public Domain
National Trust, Wikimedia Commons // Public Domain

Henry VIII may have never earned his reputation as an ill-mannered tyrant if it weren't for injuries he sustained at age 44. Now, as Live Science reports, archaeologists have uncovered the infamous jousting yard where that history-changing accident took place.

Prior to the beheading of Anne Boleyn—his second of six wives—King Henry VIII was regarded as a kind, gregarious leader by those who knew him. The point where descriptions of him changed their tone coincided with a fall he took on January 24, 1536.

While jousting at Greenwich Palace, Henry was tossed from his armored horse and further injured when his steed fell on top of him. The incident caused him to lose consciousness for two hours and nearly cost him his life.

Though it was never diagnosed, some experts believe Henry VIII sustained a brain injury that day that altered his personality. From that point on, he was characterized as irritable and cruel. He was in constant pain from migraines and an ulcerated leg, which could also explain the mood shift. The (sometimes violent) dissolution of most of his marriages occurred post-accident.

Ruins of the jousting yard, or tiltyard, where that fateful incident took place are located 5.5 feet beneath the Maritime Greenwich World Heritage Site, the former site of Greenwich Palace. After falling into disrepair, the palace was demolished by Charles II, and the exact location of the tiltyard was forgotten. A team of archaeologists led by Simon Withers of the University of Greenwich used ground-penetrating radar (GPR) to locate the remnants buried beneath the ground earlier this year.

The giveaways were the footprints of two octagonal towers. The archaeologists say these were likely the foundations of the bleacher-like viewing stands where spectators watched jousting matches. That would place the historic tiltyard about 330 feet east of where it was originally thought to be situated.

The radar scans provided a peek at what lies beneath the Maritime Greenwich World Heritage Site, but to learn more, the archaeologists will need to get their hands dirty. Their next step will be digging up the site to get a better look at the ruins.

[h/t Live Science]