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Reading A Letter That's Been Sealed For More Than 300 Years—Without Opening It – KCCU

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An unopened letter that was mailed back in 1697 but never delivered has been read by researchers who have developed a way to virtually “unfold” sealed letter packets without having to actually break the seal.

The new technique, described in the journal Nature Communications, should allow historians to learn more about “letterlocking,” the practice of using elaborate slits, folds, creases and tucks to turn a flat sheet of paper with a written message into a tamper-resistant package.

Such security measures were an everyday part of life for centuries. “The envelope as we know it, the gummed envelope, wasn’t invented until the 1830’s,” says Jana Dambrogio, a conservator with the Massachusetts Institute of Technology Libraries in Cambridge, Mass. “And so before then, everyone letterlocked.”

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Letterlocking technologies varied greatly, with people folding and sealing their messages in hundreds of different ways. “They can make it look like it’s less secure and have security hidden on the inside,” says Dambrogio. “Or they can make something look very secure, but it actually isn’t that secure on the inside, when you open the letter packet.”

Letterlocking hasn’t gotten much attention until recently, however, and in the past, archivists would open locked letters by simply cutting them. “What do we lose when we open the unopened?” asks Dambrogio.

She was intrigued to learn of a seventeenth-century postmaster’s trunk from The Hague in the Netherlands that contained 577 unopened letter packets. Back then, if a letter couldn’t be delivered for some reason, workers would keep it around in case the intended recipient ever showed up to claim it and pay the postage.

Dambrogio and a team of researchers now say they’ve managed to read one of these unopened Renaissance letters, with the help of a medical scanner.

“It was originally designed to study teeth. It’s this really high-resolution X-ray scanner,” says Amanda Ghassaei of Adobe Research in San Francisco, who explains that the device can create a detailed three-dimensional X-ray image of a folded letter.

Because the inks used back then contain a lot of metal, says Ghassaei, the writing “shows up as a very bright region on the scan, kind of like the way that your bone would show up really bright on an X-ray.”

The trouble is, the ink markings look all jumbled up, because many layers of folded paper are pressed close together and words appear to overlap.

“The challenge here was really to try to find a way to manipulate that data and actually virtually unfold it so that we could get it into a flat state,” she says, “and actually kind of generate something that looks like an image of the letter if it had been opened and flattened. But in reality, we haven’t even touched the letter.”

Their first success, using a brute-force algorithm to study a partially-opened letter, came at the end of 2016, recalls Holly Jackson, a student at MIT who has been working on the project.

“Since then we’ve kind of been refining this pipeline, trying to make it fully automated, fully generalizable to lots of different intricate folding patterns,” says Jackson.

The unopened 1697 letter from the postmaster’s trunk has an especially lovely folding pattern, says Dambrogio, even though the letter’s contents make it clear that it’s just an ordinary bit of family business, with one cousin writing to another to request a copy of an official death certificate for one of their relatives.

“In one sequence it makes an arrow shape, which folds in on itself and is sealed with a little piece of adhesive,” says Dambrogio. “So it’s quite beautiful and it’s thrilling that we can read it without tampering with the letter packet, leaving it to study as an unopened object.”

The work impressed Brent Seales, a computer scientist at the University of Kentucky in Lexington who has worked on virtually “unwrapping” ancient scrolls that are too fragile to be unrolled.

“They revealed the text, which was awesome. To do that without opening the letter is itself a sort of miracle, which I love,” says Seales. “They were also complete about the technology of the artifact itself, because we can’t forget that this stuff is embodied in physical form. And that’s important.”

He notes that the practice of sealing written documents dates back to the clay tablets used by the Sumerians, and it can put historians in a difficult position because to open something is to partially destroy it.

“There’s this idea of the physical artifact that needs to be preserved and then the scholarly work that we would like to do, which is to know what it says,” notes Seales. “How do you break that deadlock?”

Virtual unwrapping can provide an answer, he says, but its methods always have to be fully described and transparent, as they were in this case, so that others can follow the process step by step. “They told you in their paper what a letter says inside without ever opening it. You have to have some kind of trust in that. Because the artifact itself will never be opened,” Seales points out.

Many, many unopened letters await further study, including hundreds in the Prize Papers, a collection of mail and other materials confiscated from enemy ships by Britain from the 17th to the 19th centuries.

Howard Hotson, a historian with the University of Oxford, believes that studying unopened letters and others that were once locked could perhaps “reveal patterns of trans-cultural, potentially global technological exchange, as sophisticated letterlocking techniques are passed from one country, sphere of activity, or continent to another during the long period in which these techniques were in use.”

Copyright 2021 NPR. To see more, visit https://www.npr.org.

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Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

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More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

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Follow AP’s climate coverage at https://apnews.com/hub/climate

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Follow Seth Borenstein on Twitter at @borenbears

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Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

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‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

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It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

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The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

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TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

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