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You know how it goes: You’re trying to get some shut-eye in your bunk after a long shift of scraping samples of prebiotic material from red rocks in Utopia Planitia, and before you know it, your alarm bell rings. And then you see it woke you up a full 477 microseconds early!

Life on Mars is tough. Figuring out the exact time isn’t much easier.

Even on the larger end of the timescale, Martian chronometry is not exactly simple; the planet takes about 687 Earth days to go around the sun, making calendrical coordination with Earth pretty hairy. It also spins on its axis—completing one Mars day—in 24 hours, 39 minutes, and 35 seconds (to distinguish this period from an Earth day, we call it a “sol,” referencing the Latin word for the sun). Keeping track of your schedule on Mars would be different than doing so on Earth. But still, at its core, it would just be a matter of conversion.

Building an accurate Martian clock, on the other hand, can be very tricky, depending on how accurate you want it to be. When you start to slice time into smaller and smaller bits, the problem concerns not only engineering but also fundamental physics. That’s because the flow of time on milli- and microsecond scales is affected by relativity, gravity and orbital mechanics, which can vary radically from world to world.

The good news is that a pair of physicists did all the associated mathematical heavy lifting for Mars and published their results on December 1 in the Astronomical Journal. With their help, we can fine-tune our Martian timepieces.

It was Albert Einstein who really first got this ball rolling. Among many other things that emerged from his special theory of relativity, he postulated that time does not necessarily flow the same for two independent objects. The most commonly used example of this is how a clock runs more slowly when it is moving relative to an observer. The effect is pretty small until that motion nears the speed of light, whereupon it can get very large.

But there’s another twist to relativity: besides relative motion, gravity affects time’s flow as well! The stronger the gravity, the slower a clock will tick relative to some observer far away, where the gravitational effects are weaker. Both of these phenomena can affect us on Earth: GPS satellites, for example, orbit far above Earth, where gravity is weaker, so their clocks run faster than those on the surface. But the satellites’ rapid orbital motion also slows their clocks. Combined, these effects cause their clocks to tick about 38 microseconds faster than ones on the ground. This profoundly affects their accuracy in mapping, throwing them off by about 10 kilometers per day. Think about how angry you’d be if your smartphone’s map app was off by a kilometer or so after only a half hour of use. Happily, GPS takes all this into account, so the positional accuracy it calculates is pretty high. But this situation just shows how important relativity can be

What does this have to do with the Red Planet? Well, for one thing, while Mars is a rocky world like our own, it’s much smaller, about a tenth the mass of Earth. Its surface gravity is some three times less than what we feel at home. So on Mars, I’d only weigh about 65 pounds (29 kilograms)! I bet my knees and back would feel a lot better about that.

But this also means a clock on Mars feels less gravity than one on Earth, so it will run faster. And unfortunately, plugging this into Einstein’s equations to calculate that advancement is no easy task.

First, you have to define what the average surface of Mars is. After all, if you’re on a mountain, you’re farther up from the average elevation than you’d be if you were in a valley, where you’d feel a different amount of gravitational force.

But you can’t just average between the highest peaks and lowest valleys to arrive at some clear median. Oh, no. Just as a world can have varying surface elevation, it can also have a varying subsurface composition, with some regions being denser (and thus having greater local gravity) than others. Still, factoring this in alongside things like a global rotation rate and the influence of any massive orbiting moons, it’s possible (though difficult) to determine the average surface for any given world.

We did this properly for Earth in the late 20th century—and thanks to our extensive robotic orbital reconnaissance, we’ve done it more recently for Mars, too. Once calculated, Mars’s average surface can be used to gauge gravity’s influence on clocks anywhere on the planet.

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JPMorgan Chase CEO Jamie Dimon says that it’s certain that AI “will eliminate jobs.” However, he also notes that mastering a few skills can help workers protect themselves.

Dimon, who leads the largest bank in the U.S. with $3.9 trillion in assets, told Fox News’ Sunday Morning Futures recently that AI taking over tasks “doesn’t mean that people won’t have other jobs.”

“My advice to people would be critical thinking,” Dimon said in the interview, which aired earlier this week. “Learn EQ [emotional quotient or emotional intelligence], learn how to be good in a meeting, how to communicate, how to write. You’ll have plenty of jobs.”

Critical thinking involves the ability to analyze information and question assumptions, while a high EQ allows workers to handle conflict and collaboration well. Communication and writing skills mean explaining ideas clearly.

Dimon says these skills matter in every field, not just banking. He previously highlighted the importance of soft skills in CEOs, stating last year that good leaders get out from behind their desks to meet and communicate with clients and competitors. They are curious, ask a “million questions” and learn from every interaction, he said.

Other CEOs agree with Dimon that curious minds get ahead. Amazon CEO Andy Jassy said in a video published by Amazon last year that the difference between people with successful careers and those who stay “stagnant” is a hunger for learning. “You have to be ravenous and hungry to find ways to learn,” Jassy said.

Research has shown that using AI can lead to a drop in critical thinking skills. A study published earlier this year from MIT suggests that the use of chatbots like ChatGPT could weaken the neural connections that help users process information and think critically.

Brandon Daniels, the CEO of Exiger, an AI-powered supply chain risk management company, told Entrepreneur last month that if AI is used correctly, it actually demands deeper critical analysis, not less.

Daniels agreed with Dimon that workers need to develop critical thinking skills to get ahead in the age of AI and argued that to get the most out of AI, users need to fact-check it. Daniels said that the best results arrive when people combine their own judgment with AI, rather than letting the technology do all the work.

“We need more significant critical reasoning skills,” Daniels said. “The AI, in order to be effective, has to understand the nuances of your question, and you have to understand the limitations of the response.”

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Jamie Dimon, CEO of JPMorgan Chase. Photographer: Eva Marie Uzcategui/Bloomberg via Getty Images

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Taylor Swift’s Eras Tour concluded a year ago in Vancouver, but the pop superstar isn’t done with her record-breaking live show just yet. On Friday, she dropped the concert film “The Eras Tour: The Final Show” on Disney+ along with the first two episodes of a behind-the-scenes six-part documentary series, “The End of an Era.”

While cameras captured preparation for the tour long before its first date in March 2023, the crew was supposed to join Swift on the road in Vienna in August 2024. But her three shows in that city were canceled after two men were arrested and accused of plotting a terrorist attack there, with her concerts as a target. The first episode focuses on how Swift struggled to get past that moment, and the second has a lighter feel, capturing how the production continued to evolve on the road (particularly with one amusingly overwhelmed special guest: Florence Welch).

Here are five key takeaways.

Goals for the Eras Tour were always lofty.

“The End of an Era” shows that many people in Swift’s circle — including her mother, Andrea — were skeptical about her idea to make the tour an extravaganza lasting over three hours. But Swift’s intention was always to “over-serve” her fans. Maximalism — and giving attendees an escape from the everyday — was the point.

“We got a list of about 40 songs,” the bassist Amos Heller says. “This is insanity. What are we going to cut? And I think we added three songs.”

The series shows that Swift had specific ideas for the band — there are lots of shots of her enthusiastically air drumming and vocalizing musical parts — and worked out the surprise numbers that varied from night to night with each artist. In one scene, she and Ed Sheeran rehearse their duet on “Everything Has Changed,” intently watching each other’s fingers as they play acoustic guitars.

The Eras Tour was touched by tragedy.

The first episode digs into how Swift handled two frightening events that happened in quick succession. In late July 2024, three children died after a knife attack in Southport, England, at a Swift-themed dance class. The next month, Swift’s Vienna dates were called off after the thwarted terrorist attack. As Swift planned to return to the stage in London, cameras caught her battling what she called a “physical reaction” to her nerves. “It sort of feels like we’ve done like 128 shows so far but this is the first one where I feel like, I don’t know, like I’m skating on thin ice,” she says.

In interviews, Swift likens her job to a pilot flying a plane, where she has to remain calm so nobody else has a sense of alarm. Though she breaks down following a private meeting with survivors of the Southport attack and families affected by it, the show must go on: “It’s my job to be able to handle all these feelings and then perk up immediately to perform.”

Swift loves secrets.

Yes, viewers do see Swift getting into what appears to be a cleaning cart in order to make her way to the stage.

She also details how her team worked surreptitiously to incorporate songs from “The Tortured Poets Department” into the set after its release in April 2024. They constructed a “top secret” facility to rehearse that portion, but couldn’t play the music on speakers as they learned the choreography because it hadn’t been released yet.

Swift’s penchant for secrecy is also invoked when she plans to bring Welch out at Wembley Stadium for a rendition of “Florida!!” Welch, who has headlined arenas for years with Florence + the Machine, is still taken aback by the scale of Eras. (She likens arriving onstage with Swift to landing on Mars.)

Swift has changed her football allegiances.

Swift is engaged to the Kansas City Chiefs’ Travis Kelce, but fans will definitely notice that in footage of early Eras rehearsals, she’s wearing a Philadelphia Eagles sweatshirt. (It’s a display of loyalty to her home state’s team before she switched allegiances.) Kelce doesn’t physically show up in the first two episodes, but his voice is heard in phone calls to Swift, marveling at her onstage skills. She tells him, “Some people get a vitamin drip. I got this conversation.”

Choreography has long been a challenge for Swift.

The second episode focuses heavily on the tour’s dancers as Swift integrates “The Tortured Poets Department” into her set. Viewers get a chance to meet Kameron Saunders, who praises Swift for giving a dancer with his body type a featured role, and Amanda Balen, who was retired and working as an associate to the choreographer Mandy Moore when Swift asked her to appear onstage.

Swift admits that choreography hasn’t always been her strongest suit. “It’s taken me a really long time to be even fine at choreography,” she says. Moore has been able to teach her the moves from a “lyrical perspective.” “I don’t do eight counts,” Swift explains, “I learn based on what syllable of the lyric I’m attaching the movement to, and I can’t really learn any other way.”

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Taylor Swift onstage at the opening night of the Eras Tour in March 2023.Credit…Cassidy Araiza for The New York Times

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IGNACE, Ontario, C.E. 51,500—Feloo, a hunter, chews a strip of roasted caribou flank, washing it down with water from a nearby lake. Her boots press into thin soil that, each summer, thaws into a sodden marsh above frozen ground. Caribou herds drift across the tundra, nibbling lichen and calving on the open flats. Hooves sink into moss beds; antlers scrape dwarf shrubs. Overhead, migratory birds wheel and squawk before winging south. Two lakes remain liquid year-round, held open by hidden taliks—oases of water in a frozen land. Beneath it all lies the Canadian Shield: a billion-year-old granite craton, a basement of rock, scarred by ice, that has endured glaciation after glaciation. In 10 or 15 millennia, Feloo’s world will vanish beneath three kilometers of advancing ice.

Feloo is unaware that 500 meters below her feet rests an ancestral deposit of copper, steel, clay, and radioactive debris. Long ago, this land was called Canada. Here, a group known as the Nuclear Waste Management Organization (NWMO) built a deep geological repository to contain spent nuclear fuel—the byproducts of reactors that once powered Ontario, Quebec, and New Brunswick. The vault was engineered to isolate long-lived radionuclides such as uranium 235, which has a half-life that exceeds 700 million years—sealing them away from war, disaster, neglect, sabotage, and curiosity for as long as human foresight could reach.

NWMO issued reports with titles such as Postclosure Safety Assessment of a Used Fuel Repository in Crystalline Rock. These studies modeled future boreal forests and tundra ecosystems, simulating the waxing and waning of vast glacial ice sheets across successive ice ages. They envisioned the lifeways of self-sufficient hunters, fishers, and farmers who might one day inhabit the region—and even the remote possibility of a far-future drill crew inadvertently breaching the buried canisters.

Feloo was born into a world that has remembered none of this. Records of the repository were lost in the global drone wars of C.E. 2323. All that endured were the stories of Mishipeshu, the horned water panther said to dwell beneath the lakes—and to punish those who dig too deep. Some of Feloo’s companions dismiss the legend; others whisper that the earth below still burns with poison. Yet every step she takes is haunted by choices made tens of millennia before—when Canada undertook the Promethean task of safeguarding a future it could scarcely imagine.

In 2024, NWMO announced that Canada’s deep geological repository for spent nuclear fuel would be built in the granite formations of northwestern Ontario, near the Township of Ignace and the Wabigoon Lake Ojibway Nation. The decision capped off a 14-year siting effort that solicited volunteer host communities and guaranteed them the right to withdraw at any stage of the process. NWMO is now preparing for a comprehensive regulatory review, which will include a licensing process conducted by the Canadian Nuclear Safety Commission. This means the development of impact assessments that will be specific to the Ignace site. NWMO has also pledged an Indigenous-led regulatory process alongside federal oversight, with the Wabigoon Lake Ojibway Nation conducting its own assessments to ensure the project reflects Anishinaabe principles of ecological stewardship. If approvals proceed, construction could begin in the 2030s, and the repository could go into operation in the 2040s.

A deep-time repository, like a deep-space probe, must endure without maintenance or intervention, independently carrying human intent into the far future.

A deep geological repository can be seen as a reverse ark: a vessel designed not to carry valuables forward in time but to seal dangerous legacies away from historical memory. Or it can be understood as a reverse mine: an effort returning hazardous remnants to the Earth rather than extracting resources from it. Either way, it is more than just a feat of engineering. Repository projects weave together scientific reasoning, intergenerational ethics, and community preferences in decisions that are meant to endure longer than empires. As messages to future versions of ourselves, they compel their designers to ask: What symbols, stories, or institutions might bridge epochs? And what does it mean that we are trying to protect future humans who may exist only in our imaginations? I am a cultural anthropologist. From 2012 to 2014, I spent 32 months living in Finland, conducting fieldwork among the safety assessment teams for Onkalo—an underground complex that is likely to become the world’s first operational deep geological repository for spent nuclear fuel. The teams’ work involved modeling far-future glaciations, earthquakes, floods, erosion, permafrost, and even hypothetical human and animal populations tens of millennia ahead. That research became the basis for Deep Time Reckoning, a book exploring how nuclear-waste experts’ long-range planning practices can be retooled as blueprints for safeguarding future worlds in other domains, from climate adaptation to biodiversity preservation.

During the Biden administration, I joined the U.S. Department of Energy’s Office of Spent Fuel and High-Level Waste Disposition, where I helped advance participatory siting processes modeled on approaches that had proven successful in Finland and Canada. I served as federal manager of the DOE’s Consent-Based Siting Consortia—a nationwide coalition of 12 project teams from universities, nonprofits, and the private sector that were tasked with fostering community engagement with nuclear waste management. Through it all, I came to see repository programs as civilizational experiments in long-term responsibility: collective efforts to extend the time horizons of governance and care so that shared futures may be protected far beyond the scale of any single lifetime or institution.

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Federico Tramonte

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Democratic Representative Al Green said Friday, after failing to secure enough votes to impeach President Donald Trump, that he would do it again.

In a speech on the House floor, the Texas congressman said he was “a proud, liberated Democrat” despite others in his party voting against him on his resolution to impeach the president.

“I believe in this flag. I believe in liberty and justice for all. I don’t support beneficial bigotry. I don’t support people who desecrate what the flag really means as it relates to the Constitution,” Green said, in part.

Why It Matters

Green has tried multiple times to impeach Trump, and the backfiring of previous attempts appeared to have made Democrats much more cautious about supporting another attempt, particularly with Republicans controlling the House and the Senate.

What To Know

Green, wearing a tie with alternating red-and-white stripes and white stars on a blue background, said he believed in the Pledge of Allegiance and that the tie was a symbol of it.

“There are many people who have said to me that the tie is old, that it appears to be soiled and stained, but it’s my favorite tie, it’s a tie that I will never surrender,” Green said. “It’s a tie that means something to me because it stands for something, it stands for the Pledge of Allegiance.”

Green spoke for around 35 minutes on Friday, saying he was grateful to the lawmakers who showed support for his efforts on Thursday, and drawing on previous examples of scholars and lawmakers who have spoken about the powers of impeachment.

Twenty-three Democrats opposed his motion, while an additional 47 voted “present.” The majority of House Democrats, 140 lawmakers, voted against tabling the resolutions. Additionally, 214 House Republicans voted to table the effort, while six did not vote.

The Texas Democrat said he was not deterred, referencing the “millions” of people who stand against the current administration’s policies, and that he saw no reason not to try to impeach Trump again.

“Those were not the last articles of impeachment that will be brought to the floor, those yesterday HRes939, they’re not the last to be brought to the floor for a vote to remove Donald John Trump from office,” Green said.

Trump was impeached twice previously by the House, first in December 2019 over allegations that he withheld congressionally approved aid to Ukraine in a bid to blackmail a political rival.

The president was then impeached again following the January 6, 2021, riot at the U.S. Capitol carried out by his supporters. That second effort was bipartisan, with 10 House Republicans voting in favor and five GOP senators voting to convict Trump.

While seemingly not willing to impeach the president, Democrats have filed articles of impeachment against Defense Secretary Pete Hegseth and Secretary of Health and Human Services Robert F. Kennedy Jr. this week.

What People Are Saying

House Democratic leaders in their statement said they’d vote “present”: “Donald Trump’s out-of-control behavior continues to put the health, safety, and economic well-being of the American people at risk. At the same time, House Republicans have zero interest in holding this corrupt administration accountable.”

Florida Republican Representative Mario Díaz-Balart told the Associated Press on Thursday: “It shows you they have no agenda. And so this is the kind of stuff that they’ve been doing, as opposed to actually trying to solve the American people’s issues. This is not a surprise, but it just shows you that the Democrats continue to do the same kind of thing they’ve been doing for years, which is playing games and not coming up with real solutions.”

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In return, the Cuban government, over the years, has sent tens of thousands of medics, sports instructors and, increasingly, security professionals on assignments to Venezuela. That exchange has assumed special importance as Mr. Maduro has leaned on Cuban bodyguards and counterintelligence officers to protect himself against the U.S. military buildup in the Caribbean.

In recent years, however, only a fraction of Venezuelan oil set aside for Cuba has actually reached the island, according to PDVSA documents and tanker tracking data.

Most of the oil allocated for Cuba has instead been resold to China, with the money providing badly needed hard currency for the Cuban government, according to multiple people close to the Venezuelan government.

Some of that money is believed to have been used by Cuban officials to purchase basic goods, though the opacity of the country’s economy makes it difficult to estimate where that money ends up, or how it is spent, or how much goes to business intermediaries with ties to both governments.

On Friday, Cuban officials condemned the American seizure of the tanker, calling it in a statement an “act of piracy and maritime terrorism” that hurts Cuba and its people.

“This action is part of the U.S. escalation aimed at hampering Venezuela’s legitimate right to freely use and trade its natural resources with other nations, including the supplies of hydrocarbons to Cuba,” the statement said.

The White House did not immediately respond to a request for comment.

The main person managing the flow of oil between Cuba and Venezuela is a Panamanian businessman named Ramón Carretero, who in the past few years has become one of the largest traders of Venezuelan oil, according to PDVSA data and people close to Venezuela’s government.

The U.S. Treasury Department imposed sanctions on Mr. Carretero on Thursday for “facilitating shipments of petroleum products on behalf of the Venezuelan government.” Mr. Carretero, through a legal representative, declined to comment on the government’s decision. He did not respond to detailed questions for this article.

Mr. Carretero’s role as an economic intermediary between Cuba and Venezuela was first reported by Armando.info, a Venezuelan investigative news outlet.

Skipper, the seized tanker, was carrying oil jointly contracted by Cubametales, Cuba’s state-run oil trading firm, and an oil trading company tied to Mr. Carretero, PDVSA documents show. Overall, Mr. Carretero’s trading companies have accounted for a quarter of the oil allocated by PDVSA for export this year, the documents show.

Cubametales has won contracts to buy about 65,000 barrels a day of Venezuelan oil so far this year, a 29 percent increase from 2024, and a sevenfold increase from 2023, according to PDVSA documents. The U.S. Treasury imposed sanctions on Cubametales in 2019 for buying Venezuelan oil, a move that formed part of Mr. Trump’s previous standoff with Mr. Maduro during his first administration.

The oil from Venezuela that does reach Cuba generates electricity and provides fuel for airplanes and machinery. But it is not enough to prevent widespread power outages that have plagued the island amid a broader economic crisis.

Skipper’s planned voyage shows how, in practice, Cuba benefits from oil trade in Venezuela. Cubametales, the state-run firm, listed the ship’s destination as Cuba, suggesting that all of the company’s allocated 1.1 million barrels were heading to the island.

The tanker, however, ultimately headed to China after offloading only a small fraction of the oil to the Neptune 6 and sending it en route to Cuba, according to a person close to PDVSA.

Then, on Wednesday, as Skipper sailed east in international waters between the islands of Grenada and Trinidad, it fell into a U.S. ambush.

Armed American law enforcement agents wearing camouflaged combat gear rappelled from a helicopter onto the tanker’s deck on Wednesday, according to a video released by the U.S. government and a U.S. official with knowledge of the operation. The crew offered no resistance, and U.S. officials said there were no casualties.

U.S. officials said they would seek a warrant to seize the oil, valued at tens of millions of dollars, adding that the crew had agreed to sail the vessel under Coast Guard supervision to a U.S. port, likely Galveston, Texas.

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An oil tanker called the Skipper in the southern Caribbean Sea. It was seized by the United States. Credit…Vantor, via Associated Press

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