America’s National Parks are the perfect way to appreciate nature’s majesty without encountering any of its dangers. For most sensible visitors, the biggest risks they’ll face will be poison ivy or mosquito bites. But a recent discovery at Yellowstone has some outdoor authorities seriously worried.

In 2017, a team of geologists carried out a large-scale study there, though the data didn’t quite match up with what they were expecting. It soon became apparent that they stumbled upon a serious threat brewing deep inside the Earth. And this phenomenon cast a shadow far larger than just one park.

It’s no secret that Yellowstone is a hotbed of volcanic activity. Sometimes for hours, tourists will wait near one of the park’s famous geysers to witness a magnificent eruption. But rarely do they think about what’s happening underground.

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Fortunately, we have expert geologists who do nothing but investigate the mysteries waiting beneath the Earth’s surface. Scholars from London’s Royal Holloway University had a particular interest in the American West in 2017.

Royal Holloway

Dr. Saswata Hier-Majumder and his colleagues placed over 500 seismic sensors throughout the region, which included Yellowstone’s vast landscape. They set out to analyze a deep region of the planet, one that most people don’t even know exists.

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The Earth is far less solid than many realize. Dozens of miles beneath the crust lies the mantle, the thickest layer of our planet. Warmed by the core, the mantle is liquid in many parts.

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The tectonic plates, in essence, float and drift across the mantle like surfboards on water. Hier-Majumder and his colleagues were interested in finding out more about these inner movements. Their sensors recorded every vibration from the mantle.

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“It would be impossible for us to drill far enough down to physically ‘see’ the Earth’s mantle,” explained Hier-Majumder. But they could create a detailed map thanks to their ambitious technical layout.

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While the geological community was no stranger to the seismic sensor, the Royal Holloway team set up the largest array of its kind. Years of preparation — not to mention a large portion of the university’s budget — went into the endeavor.

National Park Service

As excited as the geologists were once the data gathering was complete, a silence fell across the room when they took in the results. The subterranean region looked far different from what they expected, not to mention more deadly.

Royal Holloway

Because 217 miles below, they found a “carbon lake” — a body of molten carbonate acting as a reservoir of poisonous carbon dioxide. Not even the most seasoned geologists on the staff had seen anything like it.

Most troubling, the lake dwarfed Yellowstone in size. According to the university’s measurements, it spanned over 700,000 square miles, making it large enough to pose a problem for the entire planet.

U.S. Geological Survey

To put that number in perspective, the body was approximately the same size as Mexico. Granted, the lake couldn’t do much hundreds of miles below the Earth’s crust. But what if, in the worst-case scenario, the gas got out?

Royal Holloway

Simply put, that gas could destroy the planet as we know it. The geologists estimated that releasing just 1% of it into the atmosphere would be the equivalent of burning 2.3 trillion barrels of oil at once.

Thanks to manmade climate change, our world is already suffering from extreme weather effects, rising sea levels, and desertification. That carbon lake represented an increased threat that we might not survive, which is why the next realization was really bad news.

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Based on their knowledge of volcanic activity, the geologists knew that the carbon dioxide reservoir would have to come out sooner or later. But before you start sweating over that eventuality, know that it can play out in a couple different ways.

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Hier-Majumder explained that a type of eruption known as arc volcanism would spew 30-40% of the gas into the atmosphere, which would be a devastating blow. Who knew that climate change could theoretically be accelerated by forces inside the Earth?

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But that rush of gas would be very unlikely. When the carbon reservoir eventually does make its way to the surface, it will probably ooze out in small amounts. That’s the far safer alternative for mankind.

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Of course, the geologists deduced that carbon lakes like this typically remained dormant for about 1 billion years. That made any threat seem far from imminent, so there’s no need for anyone to try to drill to the center of the Earth.

Meanwhile, Yellowstone will probably remain a beloved natural treasure for generations to come. The chances of its famous prismatic volcanoes erupting are about 1 in 700,000 in any given year. Those odds should cool down your panic a bit.

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Ultimately, the massive carbon lake is an exciting discovery, one that Hier-Majumder hopes will shed more light on the Earth’s cycles and our changing atmosphere. At the same time, these London scientists weren’t the only ones curious about Yellowstone’s unusual chemistry.

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When Brian Wilcox joined the NASA Advisory Council on Planetary Defense, the mission laid before him was simple: find the realistic ways the world might end, and then, stop them from happening. He never could’ve predicted where his research would take him.

NASA

At first, his job mostly entailed drawing up schemes to prevent Earth from getting smashed with an asteroid or comet (none of which involved a Bruce Willis Armageddon situation). But because of his research, Brian’s attention — and worries — turned away from space debris.

Armageddon

What really started to concern Brian was in Yellowstone National Park, the 3,500-square-mile stretch of rivers, canyons, forests, and sights like Old Faithful that draws tourists from all over the world. Beneath the beauty, trouble was brewing.

Five miles under the surface is a pool of magma with access to the surface. In laymen’s terms, it’s a volcano. But because it holds so much explosive potential, scientists classify it as a super volcano, one of twenty on the planet.

University of Cambridge

“I came to the conclusion during that study,” Brian, who eventually transferred to NASA’s Jet Propulsion Laboratory, said, “that the super volcano threat is substantially greater than the asteroid or comet threat.” When diving into the possibilities, it’s easy to see why.

Deep Impact

Every 100,000 years or so, a super volcano erupts, and Yellowstone’s, according to the doomsday experts, could potentially be due: throughout history, it’s burst three times, about once every 600,000 years. It’s been about that long since the last blast.

US Geological Survey

Of course, eruption models aren’t exactly a precise science. Just because we’re at the 600,000 year mark doesn’t guarantee another magma blast. But Brian, focused on doomsday, couldn’t ignore the potential devastation of an explosion.

USA Today

Three feet of ash could blanket states like Wyoming, Colorado, Montana, and Idaho. Atmospheric cooling would induce a “volcanic winter,” wiping out crops and making it impossible to grow more. Food reserves, according to the UN, would run out 74 days later.

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After studying the destructive potential, NASA scientists were left scratching their heads. The chances of such a devastating eruption were low, sure. But they couldn’t sit around, fingers crossed, hoping the odds were in humanity’s favor.

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At the drawing board, scientists considered what they knew about volcanoes, namely that they erupted once the magma inside reached a certain temperature threshold. So, these experts thought, why not simply cool the volcano down?

Soon, a hazy plan started to form: all they needed to do to prevent potential volcanic annihilation was dump enough water into Yellowstone’s super volcano to cool it down. It was oddly archaic, but crazy enough to work. Still, others voiced criticism.

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Creating the infrastructure to transport all that water would never get mainstream support. “Building a big aqueduct uphill into a mountainous region would be both costly and difficult,” said Brian Wilcox, “People don’t want their water spent that way.”

New Zealand Herald

He went on: “People are desperate for water all over the world, and so a major infrastructure project, where the only way the water is used is to cool down a super volcano, would be very controversial.” So, what could be done?

The plan needed another layer, more depth. Back at the drawing board, experts tossed around cooling methods, keeping in mind that any infrastructure necessary would likely have to get Congress’s approval. Finally, their collective brainpower has an answer.

Instead of transporting water into the mouth of the super volcano, experts can drill down just over six miles into the earth on each side of it. Then, recyclable water will be pumped in at high pressure, cooling the magma from the bottom up. This has an additional perk.

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“Through drilling in this way,” Brian Wilcox said, “it could be used to create a geothermal plant, which generates electric power at extremely competitive prices.” Unfortunately, the strategy isn’t without seriously catastrophic risks.

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Drill at the wrong angle, and scientists risk damaging the cap over the magma chamber, which could release toxic gasses into the atmosphere or only expedite any volcanic eruption. The project also comes with a serious price tag.

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At $3.46 billion, cooling the super volcano will not be cheap. Worse, those who start the project will never see it finished: lowering temperatures to “safe” levels will take tens of thousands of years. Still, the rewards outweighed the risks.

That’s why NASA experts hope they’ve created a blueprint to tackle every super volcano threat in the future. More importantly, scientists hope they’ve brought mainstream attention to a true potential threat to the world.

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“When people first considered the idea of defending the Earth from an asteroid impact, they reacted in a similar way to the super volcano threat,” Brian Wilcox said. “People thought, ‘As puny as we are, how can humans possibly prevent an asteroid from hitting the Earth.’”

NASA

“Well,” he said, “it turns out if you engineer something which pushes very slightly for a very long time, you can make the asteroid miss the Earth.” Experts are hoping their plan does the same for this super volcano.

However, even with their attentions turned to Yellowstone, experts haven’t forgotten about meteoric threats. Lindley Johnson, a 23-year veteran of the Air Force, joined NASA’s ranks in 2003. Ever since, his mind has mostly been fixated on the end of the world.

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But don’t worry — Lindley is no crackpot. He’s not urging on the apocalypse, but rather approaching it from an analytical standpoint. Lindley serves as NASA’s Planetary Defense Officer, so nobody is better equipped to take on doomsday than he.

While humanity does a pretty good job of endangering itself on a daily basis, Lindley doesn’t worry about terrestrial threats. He’s more concerned with space rocks. Granted, most meteorites that come down to Earth are pretty small, or even microscopic.

However, what if an asteroid — say, one that is multiple football fields in diameter — was hurtling toward our planet? Odds are pretty good that it would land in the middle of the ocean, but Lindley wants more than luck on his side.

That’s why his NASA team investigates (hypothetical) cases of giant asteroids hitting densely urban areas. Thousands of years typically pass between such catastrophic events, but Lindley intends to be ready at any point.

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After all, Earth’s geography proves just how destructive a collision can be. NASA certainly doesn’t wish to see Midtown Manhattan turned into a crater, but they are interested in exactly how far that damage would spread.

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Lindley’s team continually runs simulations to get a better idea of where asteroids are most likely to strike, plus what kind of damage we can expect. In some cases, a collision may be inevitable. But Earth isn’t totally helpless.

Purdue University

For years, Lindley and his colleagues were operating on a shoestring budget. Fortunately, a 2015 audit convinced Congress just how essential planetary defense could be. They immediately buffed up Lindley’s annual spending power from $5 million to $50 million.

Los Angeles Times

With more resources on his side than he ever imagined, Lindley has led the charge against galactic peril. His NASA team assembled an arsenal of data and cutting-edge technology to keep asteroids at bay.

Vice

NASA keeps this fact on the down-low, but they’ve cataloged over 2,000 asteroids in our solar system capable of obliterating an entire continent. Blowing up such a massive rock might cause too much fallout, so Lindley has other tricks up his sleeve.

The most promising method to redirect an asteroid is through the use of kinetic impactors. These unmanned spacecraft would crash into an asteroid at high speed, thus deflecting it away from our planet. Think of it as a game of high-stakes billiards.

With all due respect to fans of Armageddon, Lindley doesn’t believe that landing on an asteroid would be the most effective solution. Still, NASA hasn’t taken that option off the table.

The Independent

Astronauts have trained for complex asteroid landings, though nobody has ever attempted the feat. NASA foresees this operation more as a way to collect mineral samples, but there’s always the chance they’ll go full Michael Bay in an emergency.

NASA has a selection of hypothetical fixes to choose from, though they’re also ramping up their asteroid prevention in more concrete ways. For instance, they’ve installed more orbital telescopes to monitor any life-threatening space rocks in the solar system.

Harvard University

The capability to spot catastrophe coming could be the most important factor in the end. Most deflection techniques require months or years to mobilize, so a few days notice won’t help at all. The good news is that NASA isn’t alone in this fight.

NASA

Lindley’s team ran exercises with FEMA — the Federal Emergency Management Agency — to prepare for collateral damage from a collision. “They are a great way for us to learn how to work together and meet each other’s needs,” Lindley explained.

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In 2019, Lindley also organized a conference with the European Space Agency and the International Asteroid Warning Network. Working together, they’ll have eyes on the sky all over the world.

While it seems unlikely that we’ll have to deal with an impending apocalypse, civilization is better prepared than ever. That news will only disappoint doomsday preppers, who may very well have stocked up their bunkers for nothing.

In spite of the life-or-death consequences of his job, Lindley says he sleeps just fine at night. It’s just another day at NASA. Besides, Lindley can name plenty of colleagues who have responsibilities that might be even more trying than his own.

Futurism