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How science is helping unearth an 80-year-old Holocaust mystery

Out of the ruins of the Warsaw Ghetto, remnants of resistance emerge, thanks to advanced geoscientific tools and a team determined to keep the horrors of history from fading.

In a grassy patch of public park in central Warsaw last week, archaeologists dug up a rusted metal coat hook and the tangled chain of a decayed necklace. The objects couldn’t be more ordinary. Or more extraordinary.

The team excavated them from the buried rubble of the Warsaw Ghetto, where German occupiers sealed hundreds of thousands of Poland’s Jews into crowded, desperate squalor during World War II and over 80,000 died inside the walls of starvation, exposure and infectious diseases. Amid the twisted metal and bits of glass, the archaeologists unearthed small, unassuming remnants of daily life, suspended in hardened earth «like a time capsule,» says Philip Reeder, a professor of natural and environmental science at Pittsburgh’s Duquesne University and chief cartographer for the group working on the dig.

A fork. A light-green heart-shaped keepsake. A palm-size silver memorial medallion for a man named Nachum Morgenstern who died in 1880, inscribed in Hebrew.

«It makes you think,» Reeder muses of the tiny heart. «Did it belong to a child who lived in that house and most likely ended up dead when the ghetto was liquidated?»

The excavation — organized by Poland’s Warsaw Ghetto Museum and led by its research specialist Jacek Konik — is part of a broader effort to fill gaps in Holocaust history using geoscientific tools. These include ground-penetrating radar; GPS systems; magnetometers, which study variations in Earth’s geomagnetic field; and electrical resistivity tomography, a technique typically used for engineering and environmental investigations that images subsurface structures down as far as 660 feet (200 meters). Geoscience allows for what’s called «non-invasive archaeology.»

«Archaeology is the most destructive science on Earth,» says Richard Freund, an archaeologist and professor of Jewish studies at Christopher Newport University in Virginia. «What’s good about the geoscience is you don’t destroy anything before you stick a spade in the earth. It’s not very labor intensive and, most importantly, it’s not very expensive.»

Because these advanced tools identify and map historical sites without disturbing human remains, they also enable searches that honor the view held by some that digging up Holocaust graves disrespects the victims.

«It’s a game changer for Holocaust studies,» says Freund. He heads a multidisciplinary geo-archaeological research group aimed at unearthing lost Holocaust history to preserve the past and to protect the future from similar depravity. The group includes Geoscientists Without Borders, a program of the Society of Exploration Geophysicists that applies geoscience to humanitarian efforts.

This summer in Warsaw’s Krasinskich Park, a powerful metal detector turned up an anomaly that Freund’s team thought could be part of the Ringelblum Archive, a vast undercover cache of documents collected by as many as 60 volunteers determined to bear witness to Jewish life in Poland under Nazi occupation. The archive contains tens of thousands of invaluable items that testify to terror and suffering, but also to courage and acts of defiance. Collated in secret, the archive itself represents one such act.

The archive — spearheaded by Warsaw-based Jewish historian and political activist Emanuel Ringelblum starting in fall 1939 when Germany invaded Poland — includes underground newspapers, essays, letters, postcards, diaries, last wills and testaments, tram tickets, ration tickets, Nazi decrees, school schedules and original drawings, literature and poetry by Jewish artists and intellectuals that bring daily life in wartime Warsaw and beyond to vivid life.

In 1946, one of the few survivors of the ghetto guided a search party to metal boxes filled with archive documents amid the ghetto’s ruins. Polish construction workers building new apartments chanced upon two milk cans holding more archive material in 1950. Another milk can has long been rumored — based on diaries like Ringelblum’s — to be hidden at the site of an old brushmaker’s shop near the ghetto’s edge.

The archaeologists had hoped the metal object detected this summer would be that missing piece. Instead, they dug into the rocky earth last week to find a large steel beam collapsed on top of brick walls.

This was a letdown, but still a significant victory, as the other, more subtle artifacts they found carry their own historical and emotional value.

«In many ways it’s a somber experience,» Reeder says of uncovering such everyday relics. «But in many ways it’s an exhilarating experience. You get to tell the stories of people who can’t.»

Freund has led international teams exploring some 30 Holocaust-era sites in Poland, Latvia, Greece and Lithuania. There, researchers have mapped sites of mass burials and used radar and radio waves to uncover a 100-foot (30-meter) hidden escape tunnel leading out of a little-known Nazi extermination site at Ponar forest, known today as Paneriai. Eighty Jewish prisoners dug the tunnel over 76 nights using only their hands and rudimentary tools like spoons.

Just 12 prisoners managed to make it through the escape tunnel to the forest, with 11 surviving to recount constructing the passageway and squeezing through it to avoid massacre. But until Freund’s team found the tunnel, there hadn’t been physical evidence to reinforce the survivors’ accounts.

More than 100,000 people died at Ponar, bullet by bullet, including 70,000 Jews, as well as Poles and Russians. The tunnel’s discovery sheds light on another piece of the story: the tenacity and hope some prisoners still managed to harbor in the most unspeakable circumstances.

«We’re using science to help write or rewrite history,» Reeder says.

Electrical resistivity tomography images the ground’s subsurface by assessing the transition of electrical charges at various depths. Because different materials conduct electricity in different ways, the ERT instrument can delineate between stone, sand, clay, organic material or open voids buried underground. It reports findings back to an attached monitor and, after processing the information with ERT-specific software, generates images that outline the shape of the underground finds.

«There’s nothing it cannot locate,» Freund says.

In July, 21-year-old Christopher Newport University undergraduate Mikaela Martínez Dettinger stood in Krasinskich Park and watched tangible pieces of the past pulled from the ground attached to electricity-conducting metal ERT stakes as passersby rode their bikes and pushed strollers in the afternoon heat.

«The tips of [the stakes] were all stained terracotta orange, and it was because we had literally been hammering them into the rubble of the Warsaw Ghetto factory that was right beneath our feet,» says Martínez Dettinger, a senior studying political science, philosophy and comparative religion who joined Freund in Poland as a research intern this summer.

«I never want to make it sound like I know what it would have been like to be in [ghetto inhabitants’] shoes,» Martínez Dettinger added, «but you can feel in your heart the sorrow or the feelings of anger or persistence these people must have felt.»

Martínez Dettinger, who wants to pursue a career in archaeology, worries her generation doesn’t know enough about Holocaust horrors. She cites a 2020 national survey of Holocaust awareness among American millennials and members of Gen Z from 50 states. Of all survey respondents, 63% didn’t know 6 million Jews were murdered and 36% thought «2 million or fewer Jews» were killed. Of those polled, 48% couldn’t name a single ghetto or concentration camp.

This summer, visiting the most notorious of those camps, Auschwitz, Martínez Dettinger walked the path that prisoners took to the gas chambers where they took their last breaths. And she toured warehouses where prisoners sorted fellow inmates’ suitcases and other personal effects. As she stepped off a gravel path onto the floor of one warehouse, she noticed the sound of her footsteps changing and realized she was standing on hundreds of buttons that had once fastened shirts, possibly like the one she was wearing that day.

With most Holocaust survivors now in their 80s and 90s, fewer and fewer are alive to share their memories. Holocaust deniers distort the facts of the mass extermination or claim it never happened at all. Earlier this month, a Texas school district came under fire after an administrator discussed with teachers the potential need to offer «opposing» views of the Holocaust, based on a new state law that requires teachers to present multiple perspectives when covering «widely debated and currently controversial» issues.

«The science helps prove if atrocities have taken place and can be used to demonstrate war crimes,» says Alastair McClymont, a Calgary-based geophysicist and environmental consultant who joined the Ponar excavation in 2016 and just returned home from working on the Warsaw dig. «Holocaust education helps young people understand how important it is to protect human rights and keep democracies from failing.»

«May this treasure end up in good hands, may it live to see better times. May it alarm and alert the world to what happened,» 19-year-old Dawid Graber, one of the Jewish volunteers who hid the Ringelblum Archive, wrote in his last will and testament.

The Ringelblum Archive isn’t the only trove of eyewitness testimony to survive the Holocaust, but it’s considered the most comprehensive, valuable chronicle of Jewish life in occupied Poland, and a vital piece in the history of Jewish resistance. UNESCO included the archive in its Memory of the World register, alongside the original manuscripts of composer Frederic Chopin and writings by astronomer Nicolaus Copernicus.

Sealed off in November 1940, the Warsaw Ghetto confined more than 350,000 Jews, about 30% of the city’s population, into 2.4% of the city’s total area, or about 1.3 square miles. German SS and police forces liquidated the ghetto in May 1943 following the Warsaw Ghetto Uprising, a monthlong armed revolt of Jewish ghetto residents trying to prevent their deportation to death camps.

Before the ghetto’s obliteration, the archivists — a group code-named Oyneg Shabes («Sabbath pleasure») — strategically hid the archive, divided in three parts to increase the chance at least some of the documents might survive. They also transmitted to the Polish underground all the information they’d recorded about deportations and murders. The underground smuggled the materials out of the country so the free world could learn first-hand of the horrors taking place.

But as Warsaw was rebuilt post-war, some city maps shifted, and that has complicated the search for the archive’s missing piece.

Using subsurface mapping techniques, Freund’s team surmised that the wartime location of the brushmaker’s shop at 34 Świętojerska Street doesn’t correspond with the modern-day 34 Świętojerska Street, where the Chinese embassy now stands — and where another team using traditional archaeology methods already tried, unsuccessfully, to find the missing part of the archive. The geoscientists concluded the old shop can now be found across the street beneath Krasinskich Park, countering long-held assumptions about the best place to search for the lost section of the archive.

«We solved an 80-year-old mystery,» Freund says.

At the end of one long workday in the park this summer, Martínez Dettinger found Freund sitting on an equipment bin, staring transfixed at a section of grass with pink flags stuck in it to indicate scanners had found an object of interest. She asked him a question, but he couldn’t seem to summon the words to answer.

«He could not take his eyes off the piece of grass, and he looked at me and goes, ‘This could be the Ringelblum Archive,'» Martínez Dettinger recalls. «It felt like a moment out of a movie.»

Last week’s excavation might not have produced the cinematic scene the team envisioned, at least not yet. But they hope the Polish government will issue further permits so they can excavate more of the area they’ve identified as the former 34 Świętojerska Street.

«What we were unable to cry and shriek out to the world, we buried in the ground,» the young Dawid Graber wrote. Now that Freund’s team has pinpointed the original location of the brushmaker’s shop, they’re determined to make more silenced voices heard.

«The work,» Freund says, «will continue.»

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Technologies

TikTok’s Sexy Affair With National Parks Isn’t Clickbait. It’s a Wake-Up Call

Social media thirst traps are spotlighting a funding crisis for public lands. And millions of people are paying attention.

National parks, gay country music and thirst traps have a lot in common, at least on the internet. 

Hundreds of TikTok posts combining sexually explicit audio, comical memes and stunning views of nature have flooded social media feeds. The viral trend coincides with President Donald Trump’s unprecedented funding cuts targeting federal parks, forests, monuments, seashores and trails. 

The message of #ParkTok and #MountainTok is G-rated: to conserve and protect public lands. The raunchy content is merely a wrapper to lure followers and get that message in front of as many people as possible. 

At first glance, the TikTok fan accounts for Yellowstone and Joshua Tree — among dozens of other national parks, forests and recreation sites — appear to be competing in an unhinged brawl. Some commenters speculate that federal park rangers or marketing strategists have gone rogue to garner outside financial support.

But the unofficial accounts, which are growing in number daily, are run by independent content creators with no affiliation to the government. According to the National Park Service’s Office of Public Affairs, the NPS has no official presence on TikTok, as there are no terms of service between federal agencies and the platform. 

«Viral trends focused on national parks can certainly boost park visibility and drive increased interest and awareness,» the National Park Service told CNET in an email. «We appreciate the enthusiasm for our nation’s parks and the creative ways individuals share their experiences online.»

And millions of social media followers say they’re here for it. Promoting the country’s vast landscape and its preservation for future generations could serve as a kind of spiritual uplift in dark times. 

Nature is sexy; budget cuts aren’t 

Far beyond the racy adult content, there’s a unifying purpose to posting videos of cascading waterfalls, colossal trees, seductive deserts and enchanting wildlife. 

Researchers have noted that national parks are key to conserving biodiversity and supporting people’s well-being. And it seems everyone, not just nature nerds, can get behind these public lands: US national parks saw a record number of recreation visits last year, nearly 332 million.

«If you actually love all this stuff, you get attached to that beauty,» said Kim Tanner, the creator of the Joshua Tree fan account. «And then you realize you don’t want that beauty damaged.»

The Trump administration’s 2026 budget plan includes slashing more than $1 billion from the National Park Service. It also threatens to axe a whopping $33 billion from national recreation management programs and conservation and preservation grants. The grants are critical to maintaining 433 individual areas of public lands covering more than 85 million acres, which are managed by the NPS.

The National Parks Conservation Association says the White House’s budget reductions are the largest proposed cuts to the National Park Service in its 109-year history and could «decimate at least 350 National Park sites.» Many have said Trump is laying the groundwork to sell off public lands and turn recreational areas over to state-level management. 

According to Kristen Brengel, senior vice president of government affairs for the National Parks Conservation Association, the NPS has already lost nearly 2,500 employees, or nearly 13% of its staff, in what she calls a «brain trust exodus» of environmental experts. 

«What’s happening right now, in trying to dismantle the National Park Service from the inside out, is more horrific than anything we’ve seen before,» Brengel told me. 

Getting wild for the wild 

TikTok is controversial, and so is sex. That’s precisely why trends like these have political capital, capable of attracting admirers and haters, and bringing everyone else into the conversation.  

«The polarization on social media is reflective of our real-life political polarization,» said CNET social media reporter Katelyn Chedraoui. 

The #ParkTok and #MountainTok creators, some of whom are former park employees, are all nature lovers who span the political spectrum. Many of the accounts openly denounce the administration’s threats against the parks and direct viewers to demonstrations or fundraisers, but the trend isn’t overtly partisan or activist-driven. 

«Most of their posts work on a subconscious level, prompting viewers to think about the national parks and their own experiences with them,» said Chedraoui. «It’s simple but effective.» 

In fact, the TikTok engagement around public lands originated before the budget cuts to the parks. The first three fan accounts — Mount Hood, Mount Rainier and Yellowstone — appeared right after the elections last November. Managed by three friends who are avid outdoor enthusiasts, the accounts put up posts early on that were a mix of comic relief and wilderness awe. 

There wasn’t much thirst trap content then. «It was just waterfalls and vistas and sunsets,» said Jaime Wash, the creator behind the Mount Hood and Mount St. Helens fan accounts. Then, two of the creators started trolling each other, and folks loved it. 

It was fake beef, but the diss-track template became a winning strategy. By January, the trend started picking up speed, with more fan accounts joining the fray. Over the last several months, the popularity of the posts has seen ebbs and flows — until fairly recently, when all of #MountainTok and #ParkTok blew up for their risqué content. 

Private parts in public lands became a magic formula, a kind of viral virility, that the creators knew how to play up. 

«Social media users are very used to brands acting unhinged on TikTok,» said Chedraoui.  

A bridge over troubled water

Some critics have slammed the parody accounts, accusing creators of trying to monetize a legitimate cause, or claiming that the sexually charged content damages the parks’ reputations. 

But according to the creators, who collaborate regularly in a group chat, making money wasn’t, and never will be, their intention. Wash told me that if at any point they do collect a payout for the content, they plan to donate the funds to the parks. 

After gaining such a huge following, Wash said, she felt it was her responsibility to get people involved. In April, the Mount Hood fan account brought out followers to Portland’s Hands Off protest. 

«We’re building a community to show that things aren’t helpless, that change can happen and we’re there for each other,» Wash said. And besides raising the alarm, the posts add comic relief and entertainment to a daily cycle of doomscrolling and anxiety. 

Tanner told me that #ParkTok and #MountainTok can open people’s eyes, showing how fragile nature really is. By highlighting endangered animals and the environmental damage from logging, drilling and mining, the posts can help millions of followers understand what’s really at stake. 

The stunning power of social media

Social media acts as a cultural barometer, unveiling public sentiment in real time and broadcasting issues that most resonate. Platforms like TikTok also give grassroots movements a megaphone, allowing everyday people to bypass traditional media filters and speak directly to broad audiences. 

«We’ve seen digital action lead to tangible action,» said Sheila Nguyen, associate director of communications and engagement for the National Parks Conservation Association. «The more people who see that social media content, the bigger the pool of people who may speak up and the more collective impact we can have,» Nguyen told CNET in an email. 

In fact, social media publicity has been shown to boost national park visitation. A 2024 research study found that positive social media posts that include photos or videos drive the biggest increases in visitation. 

«The more people we can get into these parks, the better. That way, they can experience it firsthand, see it, fall in love with it, and then want to protect it,» said Tanner. 

The National Parks Conservation Association urges people to sign up for alerts on its advocacy page so they can raise concerns with congressional representatives. 

«We feel that Congress is the best option right now to get the administration to back off of these bad proposals,» said the NPCA’s Brengel. «Congress needs to be pushed to stop some of these terrible actions.» 

Many TikTok creators I spoke with also said they’re advocating ways to hold elected officials accountable. 

«It’s heartbreaking to think the places that I absolutely love may never be the same again,» said Wash, «and I want to do anything to stop that.» 

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Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for May 20, #239

Hints and answers for the NYT Connections: Sports Edition puzzle, No. 239, for May 20.

Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.

Connections: Sports Edition has one of those oddball purple categories today, and I think I could’ve stared at the puzzle for a week and not solved it. It’s one of those «play with the letters» categories, and they’re always fun after I see the answer, but I seldom get it right. Read on for hints and the answers.

Connections: Sports Edition is out of beta now, making its debut on Super Bowl Sunday, Feb. 9. That’s a sign that the game has earned enough loyal players that The Athletic, the subscription-based sports journalism site owned by the Times, will continue to publish it. It doesn’t show up in the NYT Games app but now appears in The Athletic’s own app. Or you can continue to play it free online.  

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Your group.

Green group hint: Where the Pope is from.

Blue group hint: All-Star player.

Purple group hint: Change a letter.

Answers for today’s Connections: Sports Edition groups

Yellow group: Team

Green group: Chicago teams

Blue group: Teams Juan Soto has played for

Purple group: NBA teams with the first letter changed

Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words

What are today’s Connections: Sports Edition answers?

The yellow words in today’s Connections

The theme is team. The four answers are club, side, squad and unit.

The green words in today’s Connections

The theme is Chicago teams. The four answers are Bears, Fire, Sky and White Sox.

The blue words in today’s Connections

The theme is teams Juan Soto has played for. The four answers are Mets, Nationals, Padres and Yankees.

The purple words in today’s Connections

The theme is NBA teams with the first letter changed. The four answers are Buns, Gulls, Meat and Slippers.

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Technologies

Trump to Sign Bill Banning Deepfakes, Nonconsensual Images: What to Know

The bipartisan ‘Take It Down’ Act passed swiftly in both the Senate and the House, and has been championed by First Lady Melania Trump.

President Donald Trump is expected to sign the bipartisan Take It Down Act into law on Monday, a significant step in regulating the nonconsensual sharing of intimate images, including AI-generated deepfakes. The legislation aims to protect individuals from the harmful effects of such content, which has been increasingly prevalent in the digital age with the expansion of artificial intelligence.

Read more: Jamie Lee Curtis Celebrates Meta’s Removal of Fake AI Ad

What are deepfakes?

Deepfakes are realistic but fake images, videos or audio created using artificial intelligence to mimic someone’s appearance, voice or actions.  

One widely reported example was a 2022 viral video of Ukraine’s President Volodymyr Zelenskyy. In the altered clip, Zelenskyy appeared to urge Ukrainian soldiers to surrender to Russian forces, a message he never actually delivered. The video was quickly debunked, but it raised serious concerns about the use of deepfakes in disinformation campaigns, especially during wartime. 

Deepfakes have also been used to spread sexually explicit content or revenge porn.

Read more: Election Deepfakes Are Here and Better Than Ever

What are the key aspects of the Take It Down Act?

The Take It Down Act prohibits knowingly sharing or threatening to share intimate images of someone without their permission, including digitally altered or AI-generated deepfakes. Here is a breakdown of the bill and what it targets:

  • Criminalization of nonconsensual sharing: The act makes it a federal offense to distribute intimate images without the subject’s consent. The bill applies to both real and AI-generated content. 
  • Mandatory removal: Online platforms, such as tech and social media sites, are required to remove flagged content, including any copies of the material, within 48 hours of notification by the victim.
  • Mandatory restitution: Violators will face mandatory restitution and criminal penalties such as prison time, fines or both.
  • Protection of minors: The legislation imposes stricter penalties for offenses involving minors, aiming to provide enhanced safeguards for vulnerable individuals.
  • Enforcement by the Federal Trade Commission: The FTC is designated as the primary agency responsible for enforcing the provisions of the act.

Who supports the Take It Down Act?

First Lady Melania Trump has been a vocal advocate for the legislation over the last several months, emphasizing the need to protect children and teenagers from the damaging effects of online exploitation. Her efforts included public appearances and discussions with lawmakers to garner support for the bill. 

The bill, introduced by Sen. Ted Cruz (R-Texas), gained bipartisan backing, with cosponsors including Sen. Amy Klobuchar (D-Minn.) and Sen. Cory Booker (D-N.J.). It passed the Senate unanimously in February, followed by House approval in April with a 409-2 vote.

What are the criticisms and concerns about the bill?

While the act has been praised for addressing a growing issue, it has also faced criticism from various groups. Some digital rights organizations express concerns that the law could infringe on privacy and free speech, particularly regarding the potential for false reports and the impact on encrypted communications. There are also apprehensions about the enforcement of the law and its potential misuse for political purposes. 

For instance, representatives of The Cyber Civil Rights Initiative, a nonprofit that supports victims of online abuse, voiced strong concerns about the bill, according to PBS News. The group criticized the takedown provision as overly broad, vaguely written and lacking clear protections to prevent misuse.

What are the next steps?

Trump is expected to sign the bill Monday at 3 p.m. ET. This act will mark Trump’s sixth bill signed into law so far in his second term. By his 100th day back in office, he had enacted only five, marking the lowest number of new laws signed by a president in the first 100 days of a term since the Eisenhower administration in the 1950s, based on an analysis of congressional records by NBC News.

The signing of the Take It Down Act represents a significant move towards regulating nonconsensual intimate imagery in the digital realm. While it aims to provide greater protection for individuals, ongoing discussions will be essential to address the concerns and ensure the law’s effective and fair implementation. 

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