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Human history is something like 200,000 years old, which means we’ve had a lot of time to come up with really bad ideas.
Bloodletting. “Dynamic ticket pricing.” Invading Russia in the winter. The McLobster. You get the picture; they’ve not all been winners.
Around the turn of the 2010s, another brilliant-at-the-time idea popped into our disproportionally large prefrontal cortexes. Maybe, this niggling went, the cavemen actually had it better than we do?
This idea — which, if you consider it for more than 10 seconds, is obviously wrong, since cavemen lived in a world that had sabertooth tigers but not microwaves and walk-in urgent cares — nevertheless took off. The “Paleo diet” exploded in popularity. Fitness bros started doing Crossfit and other strength-centric ancestral exercises and overenthusiastically donated their blood to mimic the acquisition of Stone Age wounds. Being a nice parent got rebranded, favorably, as “caveman parenting.” Kevin Roose wrote an entire piece about the benefits of pooping like a caveman. These were dark times.
Fads come and go, and we’ve mostly course corrected since then. Yuval Noah Harari, whose 2014 bestseller Sapiens made him a superstar and contributed to the belief that Stone Ages humans were happier, has since been taken down a notch by fact-checkers. The Crossfit guy got canceled, high-intensity interval training is out, and “sculpt” — not a word one usually associates with cavemen — is in. We’ve at last decided that toe-shoes, meant to get us closer to our barefoot ancestors, are “stupid” and must be stopped.
Some vestiges of Stone Age mania remain, though many of the trends have moderated and become more reasonable. The Paleo diet peaked in 2013, but it’s not gone completely away; there is renewed interest, as one would expect, every January. Still, much of the diet’s foundational science — that we need to eat the foods our bodies were “optimized” to eat during the Stone Age, before the evils wrought by the agricultural revolution and its diabolical offspring: processed sugars and carbohydrates — has been debunked.
Eating whole and sustainable foods, though, isn’t going away. The “pegan diet” (from “Paleo” and “vegan”) is “like the Paleo diet,” one dietitian nutritionist has explained, in that it focuses on foods that “early humans would have hunted or gathered. But the twist is that most of your daily food intake will be plants.” Many researchers say this is the more accurate ancient diet anyway, not to mention far better for the planet. You don’t even need to justify the meal plan by saying our Neolithic forefathers did it: It’s a good idea because it’s a smart and ethical way of eating to address problems that exist in our modern world.
The extreme, macho deprivations of the early 2010s caveman trend have also had their edges sanded off. Interest in “living off the grid” has fallen since its 2013/2014 highs, but the comparatively comfy “van life” has slowly grown. People still crave an escape from the blinking, beeping demands of modern life — there is currently an 18-month-long waitlist to be shut in a completely dark, scantly furnished room in Oregon with no TV or phone, and it costs $250 a night — but that has more to do with the anxieties and demands of contemporary life than misplaced beliefs about the superiority of cavemen living. Unplugging every now and then is a good thing, even at its most literal, but not specifically because it makes us more like Ötzi the Iceman.
It seems clear in retrospect why we wanted so badly to live like cavemen: Modern life is hard. There's consumption fatigue that comes from having 62 different Oreo varieties on the shelf in the grocery store and we want someone to take over decision-making (even if that decision required an at-home meat locker). We are so time-pressed that a scientific blessing for quick workouts and winging-it parenting is very enticing. We may also sense that nature is in peril and so we long for the days when we hadn't destroyed so much of it. Every generation yearns for a “better, simpler time" but, as Gillian Osbourne at The New Inquiry wrote back in 2014, "our gazing at the oil wars and rising sea levels of today have provoked collective sighs for deep, and distant, ecological histories."
Of course, while the caveman lifestyle may have spoken to real needs, it was impossibly, laughably selective in picking what it elevated to importance. We were supposed to eat like cavemen because our bodies are genetically similar to early humans’ but no one proposed treating infections with Stone Age first-aid, even if the same principle applied.
With a healthy perspective and accurate science, ancient ways of living can still be productive sources of inspiration. But let’s not bring everything back. Because you know what else is technically an ancient and natural idea? Cannibalism.
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On Hungary’s political earthquake, mining in Argentina, and the Sam Altman attack
Current conditions: A storm corridor is set to pummel a swath of the United States from the Plains to Great Lakes for the next days • Super Typhoon Sinlaku is barreling toward Guam, where it is poised to make landfall as the equivalent of a Category 5 hurricane, while to the south Cyclone Vaianu forces hundreds of evacuations on New Zealand’s North Island • Santo Domingo, the Dominican Republic’s sprawling capital, is facing days of intense thunderstorms as floods displace cars in the Caribbean’s largest city.
Contrary to popular parlance, the Strait of Hormuz hasn’t been closed these past few weeks. It’s just been closed to any cargo not approved by the Iranian government. As I told you last week, a Wall Street analyst who went on a Gonzo reporting mission armed with Cuban cigars and packets of Zyn nicotine pouches to the Persian Gulf chokepoint concluded that billions of dollars of goods were passing through the waterway, but only on Iranian-flagged ships or Chinese vessels enjoying the benefits of political alignment with the Islamic Republic. After talks this weekend failed to reach a deal to fully reopen the Strait of Hormuz, the United States is planning a naval blockade to prevent any ships from passing and subject Tehran to the same pressure Washington is facing from the closure. That’s what President Donald Trump announced Sunday in a series of posts on Truth Social. In a reversal of last week’s ceasefire deal, Trump said the U.S. would “interdict every vessel” in international waters that passed through the Strait of Hormuz after paying Iran a toll, calling such a levy “illegal” and “world extortion.”
Oil prices spiked again in response to the president’s announcement. Already, as Heatmap’s Robinson Meyer reported last week, the war has cost Americans $17 billion at the pump. And even with the ceasefire in place, the end of the energy shock looked hazy at best, analyst Rory Johnston said on the most recent episode of the Heatmap podcast Shift Key.

For nearly two decades, Viktor Orbán ruled over Hungary with an increasingly tight-gripped fist, maintaining the closest relationship between Russia and any NATO country and providing what’s widely considered a blueprint for the West’s illiberal right to reduce checks on the power of the ruling party in a democracy. In February, his government oversaw the official start of construction on Paks II, a major new nuclear project Hungary hired the Russian state-owned Rosatom to build. Now Orbán’s 16-year tenure is coming to an end after rival conservative Péter Magyar won Sunday’s election in a landslide. During the heated campaign, which saw Vice President JD Vance visit Hungary to campaign on Orbán’s behalf in the closing days, Magyar depicted the incumbent right-wing ruler as a corrupt authoritarian selling out the country to its former Soviet imperial rulers in Moscow and vowed to rebuild Budapest’s ties with the European Union and NATO. That could spell trouble for Paks II. The project has stood out as the Kremlin’s last new commercial foothold in the West’s nuclear industry. At the start of the Ukraine war in 2022, Finland canceled a domestic joint venture with Rosatom. The U.S. nuclear giant Westinghouse, meanwhile, has cut deal after deal to supply Russian-made VVER reactors in Slovakia and Bulgaria with America-made fuel assemblies. Last summer, the Orbán administration said it had, as a result of its chummy relationship with the Trump administration, persuaded Washington to exempt Paks II from U.S. sanctions. The project’s fate under a Magyar government is uncertain, though at least one expert I spoke to on Sunday afternoon suggested the new prime minister may seek to renegotiate the deal with Rosatom to provide for more EU oversight or better terms. Canceling Paks II, which would significantly bolster the grid in a country already reliant on nuclear power for nearly half its electricity, seems unlikely at this point.
Meanwhile, Russia is getting some new competition from a European rival. Until recently, Rosatom was the only foreign company willing to invest in nuclear reactors in India, where a civil liability law passed in 2010 threatened to bankrupt developers if any accident occurred. In December, as I reported to you at the time, India passed legislation reforming the statute in a bid to attract more overseas investments into its growing atomic power sector. It’s working. The U.S. nuclear heavyweight Holtec International, which is attempting to build its 300-megawatt small modular reactors in Michigan, has expressed interest. Now the French nuclear giant EDF is exploring potential projects in the world’s most populous nation, World Nuclear News reported last week. In another bullish sign, regulators in South Korea, the democratic world’s most competent reactor builder, just approved the country’s latest plant to start up.
Argentina’s right-wing President Javier Milei notched a major legislative win last week after lawmakers in the lower house of the country’s legislature approved an overhaul of a landmark glacier protection law in a 137-to-11 vote. The victory opens “the door to mining near some of South America’s most important freshwater reserves,” the Financial Times reported, by giving provincial authorities greater discretion to determine which glacial areas warrant protection. The bill already passed in the Argentinian Senate, meaning Milei only needs to sign the legislation. He’s expected to do so. Milei pitched the bill as a way to free up areas “incorrectly classified as glaciers” to mineral extraction as his government seeks to tap Argentina’s rich lithium resources. But critics aren’t so sure. “This will not give investors the legal certainty they are looking for,” Andrés Nápoli, executive director of the Environment and Natural Resources Foundation, told the newspaper.
Milei signed a critical minerals pact with the U.S. in February as the Trump administration looks to secure non-Chinese supplies of key metals.
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Maybe the attacker was angry about data centers. Maybe the assailant took issue with OpenAI itself, or the way Sam Altman — a lightning rod figure in the American tech industry and the subject of a recent investigation in The New Yorker that raised questions about a uniquely powerful executive’s judgment — operates. Maybe the man who threw a Molotov cocktail at Altman’s San Francisco home on Friday was just compelled by illness or altered brain chemistry to act out violently against a public figure who’s been unmissable in the media. But the fact that the incident occurred less than a week after a gunman fired bullets into the home of an Indianapolis city councilmember who spoke out in support of a data center project does appear to be part of a worrying trend of violence. As Heatmap’s Jael Holzman wrote last week, the Indianapolis shooting, in which (thankfully) the lawmaker and his young son were not hurt, was the third such incident this year, “indicating the bubbling angst against data centers really does have potential to turn violent.”
In a post on his personal blog, Altman shared a photo of his husband, Oliver Mulherin, and their 1-year-old son and said he had “underestimated the power of words and narratives” amid what he admitted was an “extremely intense, chaotic, and high-pressure few years in the artificial intelligence industry. “A lot of the criticism of our industry comes from sincere concern about the incredibly high stakes of this technology. This is quite valid, and we welcome good-faith criticism and debate,” Altman wrote. “I empathize with anti-technology sentiments and clearly technology isn’t always good for everyone. But overall, I believe technological progress can make the future unbelievably good, for your family and mine.”
Battery recycling startup Ascend Elements will file for bankruptcy this Thursday, according to Bloomberg. The Massachusetts-based company raised more than $1.1 billion in equity and grants over the past 11 years as it sought to build out production from its factory reprocessing old batteries into cathode material in Georgia. But “the financial difficulties were insurmountable,” the company said.
Last summer, I told you about an abandoned green hydrogen project in Australia amid a spate of cancellations worldwide. But now a new 1.5-gigawatt project, the Murchison Green Hydrogen facility in Western Australia, has been selected for a fast-track approval under the national government’s new pilot program to speed up permitting, according to Hydrogen Insight. The program is reserved for projects of “national significance.”
The tech giant had been by far the nascent industry’s biggest customer.
Microsoft has begun telling suppliers and partners that it is pausing future purchases of carbon removal, according to two people who have been informed of its plans.
The news deals a potentially major setback to the fledgling carbon removal industry, which has relied on Microsoft’s voluntary corporate buying as an anchor source of early demand. The technology giant has made the overwhelming majority of carbon removal purchases in recent years.
It’s not yet clear whether the company could still increase its investment in existing projects or when it might resume purchases in the future.
In a statement, a Microsoft spokesperson denied that the company was indefinitely pausing all of its purchases. “We continually review and assess our carbon removal portfolio along with market conditions for the optimal balance on our path to carbon negative,” she said.
Industry data suggests that Microsoft has done more than any other private company — and arguably any organization on Earth — to support early-stage technologies that could withdraw or eliminate carbon dioxide from the atmosphere.
It has purchased 45 million tons of carbon removal, according to its own releases. The next-largest buyer of carbon removal credits — Frontier, a coalition of large companies led by the payments processing firm Stripe — has bought 1.8 million tons of carbon removal.
Microsoft made 90% of all carbon removal purchases worldwide last year, according to data from the third-party industry monitor CDR.fyi. The company is generally cited as making somewhere between 79% to 90% of all historic carbon removal purchases.
Microsoft also published guidelines about what it considered “ideal” carbon removal projects, setting de facto early industry standards for technologies including direct air capture, soil carbon management, and enhanced rock weathering.
The tech company has backed carbon removal in large part to meet its aggressive internal climate goals. Microsoft has pledged to become “carbon negative” by 2030, meaning that it must remove more greenhouse gases from the atmosphere than it emits within four years. The company also aims to eliminate its half century of historic carbon emissions by 2050.
Like other major tech firms, including Google and Meta, Microsoft has struggled to square its years-old climate goals with the urgent need to power energy-hungry AI data centers. But it has generally been seen as more environmentally friendly than other tech firms.
When Heatmap polled climate insiders late last year, Microsoft and Google were seen as the two AI tech developers who were “best” on climate. (Meta and Amazon got failing marks.)
Microsoft was making carbon removal announcements as recently as this week. It announced its most recent purchase of CDR credits only three days ago, when it bought more than 620,000 tons of credits from an indigenous-owned bioenergy carbon capture and storage project in Saskatchewan, Canada.
The Intergovernmental Panel on Climate Change considers carbon removal — technologies and methods that can reduce the amount of heat-trapping pollution in the atmosphere on century-long time scales — to be essential to meet the Paris Agreement’s climate goals.
By 2050, the world will need to remove 7 to 9 billion tons of carbon dioxide each year in order to hold to its Paris targets, according to an independent 2024 report.
Microsoft’s apparent pause comes at a lean time for the carbon removal industry, because the Trump administration has declined to spend — and in some cases even reassigned — funds previously authorized to encourage the development of the technology. For instance, the Energy Department says it plans to use more than $500 million in carbon removal funding to prop up aging coal plants.
Congress has been more generous to carbon removal, which has historically drawn more bipartisan support than other clean energy technologies. The 2026 federal spending law included more than $116 million to support carbon removal research and set up a federal purchasing program. With Microsoft’s shift, that purchasing scheme will be more important than ever.
On ARPA-E’s record commitment, and more of the week’s fundraising news
I don’t have any AI deals to bring you this week, but luckily I can still count on fusion to generate a steady stream of announcements. This time, the funding is coming from the federal government. At its annual innovation summit, ARPA-E announced it’s committing $135 million to address key barriers to fusion commercialization — a single allocation that exceeds the total amount that the agency has previously devoted to the tech after a decade of continuous funding.
There’s also, somewhat surprisingly, still venture enthusiasm for sustainable aviation fuels. And just like last week, membrane-based industrial separations tech also secured fresh capital. Could this be one of the hottest boring industries around? On the non-venture side, the industrial waste upcycling company Sedron secured a $500 million equity investment from the decarbonization-focused firm Ara Partners.
ARPA-E Makes Record Funding Commitment to Fusion Energy
The Department of Energy’s Advanced Research Projects Agency–Energy, better known as ARPA-E, has propelled research and development efforts across a broad set of potentially transformational energy technologies, from thermal energy storage to advanced geothermal systems and — of course — fusion. According to the Fusion Industry Association, the agency has backed 69 fusion projects across 34 universities, 14 national labs, and 27 companies. Seven fusion startups have emerged directly from ARPA-E programs, including Zap Energy and Thea Energy. But ARPA-E thinks there’s still so much more it can do.
This week, ARPA-E announced an additional $135 million in funding for fusion. This exceeds the agency’s total prior cumulative commitment to the technology — which stands at roughly $134 million and has helped catalyze an additional $1.5 billion in private follow-on investment. This latest capital will target what ARPA-E describes as “the toughest technical barriers” to commercialization, including the development of low-cost plasma heating systems, advanced fuels, next-generation power conversion systems, and novel plant and component designs aimed at improving durability while lowering overall costs.
“The question is no longer whether fusion is possible. The question is how fast we get fusion-generated power on the grid, and whether America leads that achievement,” said ARPA-E director Conner Prochaska at the agency’s annual Energy Innovation Summit this week. Today, there are over 50 fusion companies globally, collectively backed by about $10 billion in private investment. The agency framed this latest announcement in terms of strengthening U.S. “energy dominance” while guaranteeing an “affordable, reliable, secure energy supply.” Perhaps it slipped their minds, but it bears mention that fusion would also be a zero-carbon energy source.
Sora Fuel Gets $14.6 Million Boost Amidst a Struggling SAF Market
At the beginning of last year, I wrote about the money pouring into the search for sustainable aviation fuels that could help decarbonize medium- to long-distance flights. Even then, however, investment levels remained well below what experts say is needed to meet the aviation sector's 2050 net-zero target — and the situation hasn’t improved. The Trump administration’s infamous One Big Beautiful Bill reduced the SAF tax credit from up to $1.75 per gallon to $1.00 per gallon, dampening enthusiasm in the sector.
And yet there are still glimmers of momentum in the early-stage venture landscape, highlighted this week by Sora Fuel’s $14.6 million fundraise. The startup is basically trying to turn air into fuel. It’s developing a system that captures CO2 and then converts it directly into a syngas, which can then be upgraded into synthetic hydrocarbon fuels suitable as drop-in replacements for conventional jet fuel.
Unlike most DAC systems, Sora’s process doesn’t rely on energy-intensive sorbent regeneration — thermally or chemically cleaning the sorbents for reuse — which the company says allows it to avoid over 90% of conventional DAC costs. The startup claims it will be able to deliver captured CO2 at under $50 per ton — though that’s actually a substantial increase from the $20 per ton target that it cited in 2024. But if either number proves achievable at scale, that would be huge, not just for the sustainable fuels sector but the broader carbon capture market.
Sora will use the new capital to build a pilot facility, which it expects to have up and running within 18 to 24 months. "We've gone further, faster, and with less capital than anyone in the e-fuels space," said Gareth Ross, Sora’s co-founder and CEO.
MTR Secures $27 Million to Accelerate Membrane-Based Carbon Capture
Fresh on the heels of last week’s membrane funding news, which saw Via Separations raise a $36 million round, this week brought another tranche of capital into the decidedly unglamorous but essential world of industrial separations — that is, the process used to isolate specific chemicals or materials from a mixture. Membrane Technology and Research, better known as MTR, announced a $27 million Series B round led by the oil and gas-backed venture firm Climate Investment.
The startup develops membrane materials and systems for gas and liquid separations, and maintains a business division specifically devoted to carbon capture. With support from the Department of Energy, MTR is piloting its tech at a coal plant in Wyoming that it describes as the world’s largest membrane-based carbon capture system.
As I noted a few weeks ago, Climate Investment itself is flush with $450 million in new financing, having recently closed a growth fund aimed at helping decarbonization technologies bridge the “missing middle” in climate tech funding — the notorious gap between a company’s early-stage rounds and commercial deployment. The MTR investment comes out of this new fund.
Ara Partners Acquires Waste Upcycler Sedron, Invests $500 Million To Scale Its Tech
This week, the decarbonization-focused equity investor Ara Partners acquired a controlling stake in the industrial-scale waste processing and upcycling company Sedron. The new influx of capital will go towards scaling the company’s tech, which processes biosolids such as municipal sewage sludge and livestock manure into usable outputs such as clean water, fertilizer products, and supposedly renewable energy — though the company has not explained how the latter process works.
Sedron’s system combines multiple capital-intensive waste treatment steps — typically handled across separate units — into a single continuous processing platform. Sedron says this integration allows it to use 10 times less energy than conventional treatment approaches — although its own website used to claim a 30x reduction.
This new funding will go towards accelerating the company’s project development pipeline and expanding deployment across North America. Sedron is currently preparing to begin construction on a biosolids processing facility in Florida this spring, while also aiming to begin commercial operations at a large dairy manure project in Wisconsin this summer.