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Is the Earth itself a giant living creature?

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Monday, April 22, 2024

Rachel Victoria Hillis for Vox An old, much-ridiculed hypothesis said yes. It’s time to take it seriously. In the 1970s, chemist James Lovelock and microbiologist Lynn Margulis put forth a bold theory: The Earth is a giant living organism. When a mammal is hot, it sweats to cool itself off. If you nick your skin with a knife, the skin will scab and heal. Lovelock and Margulis argued that our planet has similar processes of self-regulation, which arguably, make it seem like the Earth itself is alive. The idea wasn’t unprecedented in human history. “The fundamental concept of a living world is ancient,” says Ferris Jabr, a science journalist and author of the upcoming book Becoming Earth: How Our Planet Came to Life. The book explores all the ways life has shaped our physical world and, in doing so, inevitably revisits the question “Is the Earth alive?” Lovelock and Margulis called the idea “the Gaia Hypothesis” — named after the ancient Greek goddess of the Earth. It was openly mocked by many in mainstream Western science. “For many decades, the Gaia hypothesis was considered kind of this fringe sort of woo-woo idea,” Jabr says. “Because for biologists,” Jabr says, life is a specific thing. “It is typically thought of as an organism that is a product of Darwinian evolution by natural selection. And Earth as a planet does not meet those criteria.” It didn’t help that the original articulation of Gaia granted Earth a certain degree of sentience. The hypothesis argued “all of the living organisms on Earth are collaborating to deliberately create a climate that is suitable for life,” as Jabr says. But yet, this idea has persisted, for a few reasons. Scientists have never been able to precisely define what life is. So, it’s been hard to dismiss Gaia completely. The Gaia hypothesis has also evolved over the years. Later iterations deemphasized that life was “collaborating” to transform the Earth, Jabr explains. Which still leaves a lot to be explored: Certainly living things don’t need to be thought of as conscious, or have agency, to be considered alive. Consider the clam, which lacks a central nervous system. Jabr found in the years since Gaia was first introduced, scientists have uncovered more connections between biology, ecology, and geology, which make the boundaries between these disciplines appear even more fuzzy. The Amazon rainforest essentially “summons” its own rain, as Jabr explains in his book. They learned how life is involved in the process that generated the continents. Life plays a role in regulating Earth’s temperature. They’ve learned that just about everywhere you look on Earth, you find life influencing the physical properties of our planet. In reporting his book, Jabr comes to the conclusion that not only is the Earth indeed a living creature, but thinking about it in such a way might help inspire action in dealing with the climate crisis. Brian Resnick spoke to Jabr for an episode of Unexplainable, Vox’s podcast that explores scientific mysteries, unanswered questions, and all the things we learn by diving into the unknown. You can listen to the full conversation here. This interview has been edited for length and clarity. Brian Resnick Do you think the Earth is alive? Ferris Jabr I do. I think Earth is alive. We can think of Earth as a genuine living entity, in a meaningful sense, and in a scientific sense. There are four parts to the argument that substantiate that statement. Brian Resnick What’s the first? Ferris Jabr Life isn’t just on Earth. It literally came out of Earth. It is literally part of Earth. It is Earth. All of the matter that we refer to as life is Earth animated — that’s how I come to think about it. If you accept that, then at a bare minimum, you have to accept as a scientific fact that the surface of the planet is genuinely alive, because it is matter that has become animated. Brian Resnick Earth animated? What do you mean by that? Ferris Jabr Every single living organism is literally made of Earth. All of its constituent elements and components are parts of the planet. We all come from the planet. We all return to the planet. It’s just a big cycle. And so life, the biological matter on the planet, is literally the matter of the planet, animated. It is living matter. Imagine a vast beach and sandcastles and other sculptures spontaneously emerge from the sand. They are still made of sand, right? They’re not suddenly divorced from the beach just because they’ve arisen from the beach. Those castles and sculptures are still literally the beach. And I think it’s the same with life and Earth. Brian Resnick So, the physical components of Earth are the material of life. And so distinguishing these two — Earth and life — seems silly because they comprise each other? Ferris Jabr The more you think about this, the more the boundaries dissolve. Every layer of the planet that we’ve been able to access, we find life there. And in the deepest mines that we have dug, we continue to find microbes and sometimes even more complex organisms like nematodes, these tiny, worm-like creatures. Brian Resnick So all life contains Earth, and Earth contains life? Ferris Jabr There are components of the Earth that are not alive in any way. The center of the planet, it’s all molten rock and there might be some solid metal in the core. But think about a redwood tree: It is mostly dead wood in terms of its volume and mass. It is mostly nonliving tissue. And then a little bit of tissue that is laced with living cells. So, you know, most complex multicellular living entities are a jumble of the animate and inanimate. Earth is not unusual in that way. Brian Resnick What is part two of your argument? Ferris Jabr All these organisms [on Earth], they give Earth a kind of anatomy and physiology. Life dramatically increases the planet’s capacity to absorb, store, and transform energy, to exchange gases, and to perform complex chemical reactions. Brian Resnick What’s a good example of this? Ferris Jabr You can think of all of the photosynthetic life on the planet acting in concert. It’s not that they’re deliberately collaborating to do something, but they’re all doing their own thing at the same time. NASA has made these amazing videos and animations and they’ve literally called them “Earth breathing,” because you can see how the levels of carbon dioxide and oxygen in the atmosphere fluctuate with the seasons. The amount of vegetation that rings the continents, especially in the Northern Hemisphere, in the mid-latitudes, it changes dramatically with the seasons. It has a sinuous rhythm. It looks like a pulse or like breathing. Brian Resnick So, are you saying something like all of the algae or plankton in the ocean are generating this together? … Is that kind of like how all of the cells in my lungs are working together to exchange gases? Or is that not quite the right way to think about it? Ferris Jabr I think we have to be careful with making too direct a comparison. You as an organism are a product of evolution by natural selection. Your structure, your anatomy is something that was written into your genome. That’s not how the Earth system formed. Brian Resnick I’m realizing a key to this conversation is what you just corrected me on. When we’re discussing this notion about the “Earth being alive,” we’re not suggesting it’s not alive in the same way you and I are. But there’s these equivalent processes that look very similar to the way my body maintains homeostasis, for example. It’s not like the Earth is exchanging gases and doing metabolism-like things in the way I’ve been evolved to. It’s not achieving homeostasis the way you or I do. But yet it is doing something that seems analogous. Is that the kind of thing that you’re arguing here, overall? Ferris Jabr Absolutely. When we’re looking at the planet, we see life-like qualities, things that resemble the characteristics of the organism, which is the most familiar life form to us. But it is not exactly the same. It is still genuinely alive, in my opinion, but is not exactly an organism. Life is a phenomenon that occurs at multiple scales. The way I think of it is that it’s not identical at all of those scales, but it rhymes and there are analogies between each of those scales. I like to think of a leaf on a tree in a forest on a planet. There’s no disagreement whatsoever within science that the cells that compose that leaf are alive. The tissues that those cells form are alive. The leaf as a whole is a living tissue. The tree we consider an organism that is also alive. We consider each of those layers to be alive. There’s no debate or controversy about that. Once we go above the scale of the organism, this is where the debate begins. Can we think of the forest, the ecosystem, as alive as well? And then one more level higher. Can we think of the planet as alive? My argument is, yes, that each of those levels, each of those scales is equally alive but not identical. And there are analogous processes that happen at each. But they’re not exactly the same. Brian Resnick What is the next plank of your argument? Ferris Jabr Life is also an engine of planetary evolution. The planet evolves over time dramatically. It is not exactly the same as standard Darwinian evolution through natural selection, but it is very much a type of evolution. Organisms and their environments continually co-evolve. Each is profoundly changing the other. This reciprocal transformation is responsible for many of the planet’s defining features: for our breathable atmosphere, our blue sky, our bountiful oceans, our fertile soils. This is all because of life and because of the way that life has changed the planetary environments. These are not default features of the planet. Life has created them over time. Brian Resnick What is the most stunning example of how life has actually changed the planet? Ferris Jabr In the beginning, Earth had essentially no free oxygen in its atmosphere, and the sky was probably a hazy orange. And when cyanobacteria began to oxygenate the atmosphere through the innovation of photosynthesis, the sky probably started shifting toward the blue part of the spectrum. The entire chemistry of the planet changed. I mean, you suddenly had an oxygen-rich environment, whereas before it was an oxygen-poor environment. That changes absolutely everything. Brian Resnick Okay, so to get back to what you were saying before, it’s not that Earth evolves in the same way that organisms evolve. But it evolves with a different mechanism, is that right? Ferris Jabr Evolutionary biologists will say a planet cannot evolve because it doesn’t have a cohesive genome. There’s no genetic inheritance going on; there’s no sexual reproduction going on. But there are analogous processes by which changes are passed down from generation to generation that are not genetically encoded. If we think about a bunch of large mammals, they’re transforming their landscape by walking through it with their immense hefts. They’re tearing down vegetation. They’re digging in, uprooting things. They’re changing the landscape. Those changes persist. And so their descendants now are evolving in a new environment changed by their predecessors. These environmental changes are not themselves genetically encoded, but they are being passed from generation to generation, and they are inevitably influencing the evolution that follows. Brian Resnick If a fundamental part of life is that it changes the world in which it exists, how are we different for accelerating the climate crisis? Because you look at the history of the Earth and you say, well, life has powerfully changed it. Who’s to say what we’re doing is necessarily not a natural process? Ferris Jabr It’s simultaneously humbling and empowering to recognize ourselves as simply the latest chapter in this long evolutionary saga of life changing the planet. It is a basic property of life to change its environment, and we’re not an exception to that. But I do think there’s a major distinction between what our species has done and what has happened before in terms of the combined scale and speed and the variety of our changes to the planet. I don’t think there’s any species or creature before us that has changed the planet on such a large scale so quickly and in so many different ways simultaneously. We have radically altered the atmosphere, the oceans, and the continents. We’ve done it in a couple of centuries. That’s a huge part of the reason for why the crisis we’re going through right now is a crisis. It has so much to do with the scale and the speed of it. Brian Resnick What’s part four of your argument? Ferris Jabr This co-evolution, on the whole, has amplified the planet’s capacity for self-regulation and enhanced Earth’s resilience. Earth has remained alive for, you know, around 4 billion years, despite repeated catastrophes of unfathomable scale, unlike anything that we have ever experienced in human history. We have to account for that resilience, for that incredible persistence through time. It is not a deliberate thing. You know, it is not a conscious or collaborative thing. It is simply an inevitable physical process, just as evolution by natural selection is an inevitable physical process. Even in the mass extinctions in Earth’s history, life recedes to its most fundamental and most resilient forms: microbes. And then life sprouts from there. Brian Resnick Are you sure you’re right about all this? Is the scientific community coming around to accept this notion that Earth is indeed alive? Ferris Jabr I mean, this book is my personal synthesis, an argument. You know, this is my viewpoint. This is how I have come to see the Earth. There are scientists who agree with me, but I would not say that this is the consensus of modern mainstream science. I think the statement that Earth is alive remains quite controversial and provocative. However, everything else we’ve been talking about, the co-evolution of life and environment, the fact that life has profoundly changed the planet. These are all well-accepted points. Brian Resnick Which part are you most likely wrong about? Or which part do you feel like has the most room for doubt? Ferris Jabr We do not have a precise, universally accepted definition of life. We haven’t explained it on the most fundamental level. Like 100 years from now, will we have a fundamental explanation for life that we’re missing right now? And if we do, will that make thinking of planets as alive defunct? And so, I think open-mindedness is fundamental to any scientific thinking or scientific process. And we have to be open to the idea that a century from now, or even sooner, all of this will be wrong. And that’s part of what I find thrilling: We don’t have all of the answers yet. Right? These are incredibly challenging ideas and concepts that we are still working out. If we had figured it out, then we wouldn’t be talking about the Gaia hypothesis anymore. The Gaia would have been officially dead a long time ago. But I think the reason that it remains relevant and continues to be debated means that we just haven’t figured it out yet. Brian Resnick Why is it useful to think of the Earth as alive? Ferris Jabr There’s a massive difference between thinking of ourselves as living creatures that simply reside on a planet, that simply inhabit a planet, versus being a component of a much larger living entity. When we properly understand our role within the living Earth system, I think the moral urgency of the climate crisis really comes into focus. All of a sudden it’s not just that, oh, the bad humans have harmed the environment and we need to do something about it. It’s that each of us is literally Earth animated, and we are one part of this much larger, living entity. It’s a realization that everything that we are all doing moment to moment, day to day, is affecting this larger living entity in some way. Brian Resnick So, the simple point that you’re making is that we are Earth, and don’t self-harm. Ferris Jabr Right, exactly.

An illustration of a land mass is covered in wildlife, lush greenery and people all interacting. Blue water and sea life surrounds.
Rachel Victoria Hillis for Vox

An old, much-ridiculed hypothesis said yes. It’s time to take it seriously.

In the 1970s, chemist James Lovelock and microbiologist Lynn Margulis put forth a bold theory: The Earth is a giant living organism.

When a mammal is hot, it sweats to cool itself off. If you nick your skin with a knife, the skin will scab and heal. Lovelock and Margulis argued that our planet has similar processes of self-regulation, which arguably, make it seem like the Earth itself is alive.

The idea wasn’t unprecedented in human history. “The fundamental concept of a living world is ancient,” says Ferris Jabr, a science journalist and author of the upcoming book Becoming Earth: How Our Planet Came to Life. The book explores all the ways life has shaped our physical world and, in doing so, inevitably revisits the question “Is the Earth alive?”

Lovelock and Margulis called the idea “the Gaia Hypothesis” — named after the ancient Greek goddess of the Earth. It was openly mocked by many in mainstream Western science. “For many decades, the Gaia hypothesis was considered kind of this fringe sort of woo-woo idea,” Jabr says. “Because for biologists,” Jabr says, life is a specific thing. “It is typically thought of as an organism that is a product of Darwinian evolution by natural selection. And Earth as a planet does not meet those criteria.”

It didn’t help that the original articulation of Gaia granted Earth a certain degree of sentience. The hypothesis argued “all of the living organisms on Earth are collaborating to deliberately create a climate that is suitable for life,” as Jabr says. But yet, this idea has persisted, for a few reasons. Scientists have never been able to precisely define what life is. So, it’s been hard to dismiss Gaia completely.

The Gaia hypothesis has also evolved over the years. Later iterations deemphasized that life was “collaborating” to transform the Earth, Jabr explains. Which still leaves a lot to be explored: Certainly living things don’t need to be thought of as conscious, or have agency, to be considered alive. Consider the clam, which lacks a central nervous system.

Jabr found in the years since Gaia was first introduced, scientists have uncovered more connections between biology, ecology, and geology, which make the boundaries between these disciplines appear even more fuzzy. The Amazon rainforest essentially “summons” its own rain, as Jabr explains in his book. They learned how life is involved in the process that generated the continents. Life plays a role in regulating Earth’s temperature. They’ve learned that just about everywhere you look on Earth, you find life influencing the physical properties of our planet.

In reporting his book, Jabr comes to the conclusion that not only is the Earth indeed a living creature, but thinking about it in such a way might help inspire action in dealing with the climate crisis.

Brian Resnick spoke to Jabr for an episode of Unexplainable, Vox’s podcast that explores scientific mysteries, unanswered questions, and all the things we learn by diving into the unknown. You can listen to the full conversation here. This interview has been edited for length and clarity.

Brian Resnick

Do you think the Earth is alive?

Ferris Jabr

I do. I think Earth is alive. We can think of Earth as a genuine living entity, in a meaningful sense, and in a scientific sense. There are four parts to the argument that substantiate that statement.

Brian Resnick

What’s the first?

Ferris Jabr

Life isn’t just on Earth. It literally came out of Earth. It is literally part of Earth. It is Earth. All of the matter that we refer to as life is Earth animated — that’s how I come to think about it. If you accept that, then at a bare minimum, you have to accept as a scientific fact that the surface of the planet is genuinely alive, because it is matter that has become animated.

Brian Resnick

Earth animated? What do you mean by that?

Ferris Jabr

Every single living organism is literally made of Earth. All of its constituent elements and components are parts of the planet. We all come from the planet. We all return to the planet. It’s just a big cycle. And so life, the biological matter on the planet, is literally the matter of the planet, animated. It is living matter.

Imagine a vast beach and sandcastles and other sculptures spontaneously emerge from the sand. They are still made of sand, right? They’re not suddenly divorced from the beach just because they’ve arisen from the beach. Those castles and sculptures are still literally the beach. And I think it’s the same with life and Earth.

Brian Resnick

So, the physical components of Earth are the material of life. And so distinguishing these two — Earth and life — seems silly because they comprise each other?

Ferris Jabr

The more you think about this, the more the boundaries dissolve.

Every layer of the planet that we’ve been able to access, we find life there. And in the deepest mines that we have dug, we continue to find microbes and sometimes even more complex organisms like nematodes, these tiny, worm-like creatures.

Brian Resnick

So all life contains Earth, and Earth contains life?

Ferris Jabr

There are components of the Earth that are not alive in any way. The center of the planet, it’s all molten rock and there might be some solid metal in the core.

But think about a redwood tree: It is mostly dead wood in terms of its volume and mass. It is mostly nonliving tissue. And then a little bit of tissue that is laced with living cells. So, you know, most complex multicellular living entities are a jumble of the animate and inanimate. Earth is not unusual in that way.

Brian Resnick

What is part two of your argument?

Ferris Jabr

All these organisms [on Earth], they give Earth a kind of anatomy and physiology. Life dramatically increases the planet’s capacity to absorb, store, and transform energy, to exchange gases, and to perform complex chemical reactions.

Brian Resnick

What’s a good example of this?

Ferris Jabr

You can think of all of the photosynthetic life on the planet acting in concert. It’s not that they’re deliberately collaborating to do something, but they’re all doing their own thing at the same time.

NASA has made these amazing videos and animations and they’ve literally called them “Earth breathing,” because you can see how the levels of carbon dioxide and oxygen in the atmosphere fluctuate with the seasons. The amount of vegetation that rings the continents, especially in the Northern Hemisphere, in the mid-latitudes, it changes dramatically with the seasons. It has a sinuous rhythm. It looks like a pulse or like breathing.

Brian Resnick

So, are you saying something like all of the algae or plankton in the ocean are generating this together? … Is that kind of like how all of the cells in my lungs are working together to exchange gases? Or is that not quite the right way to think about it?

Ferris Jabr

I think we have to be careful with making too direct a comparison. You as an organism are a product of evolution by natural selection. Your structure, your anatomy is something that was written into your genome. That’s not how the Earth system formed.

Brian Resnick

I’m realizing a key to this conversation is what you just corrected me on. When we’re discussing this notion about the “Earth being alive,” we’re not suggesting it’s not alive in the same way you and I are. But there’s these equivalent processes that look very similar to the way my body maintains homeostasis, for example. It’s not like the Earth is exchanging gases and doing metabolism-like things in the way I’ve been evolved to. It’s not achieving homeostasis the way you or I do. But yet it is doing something that seems analogous. Is that the kind of thing that you’re arguing here, overall?

Ferris Jabr

Absolutely.

When we’re looking at the planet, we see life-like qualities, things that resemble the characteristics of the organism, which is the most familiar life form to us. But it is not exactly the same. It is still genuinely alive, in my opinion, but is not exactly an organism.

Life is a phenomenon that occurs at multiple scales. The way I think of it is that it’s not identical at all of those scales, but it rhymes and there are analogies between each of those scales.

I like to think of a leaf on a tree in a forest on a planet.

There’s no disagreement whatsoever within science that the cells that compose that leaf are alive. The tissues that those cells form are alive. The leaf as a whole is a living tissue. The tree we consider an organism that is also alive. We consider each of those layers to be alive. There’s no debate or controversy about that.

Once we go above the scale of the organism, this is where the debate begins. Can we think of the forest, the ecosystem, as alive as well? And then one more level higher. Can we think of the planet as alive?

My argument is, yes, that each of those levels, each of those scales is equally alive but not identical. And there are analogous processes that happen at each. But they’re not exactly the same.

Brian Resnick

What is the next plank of your argument?

Ferris Jabr

Life is also an engine of planetary evolution. The planet evolves over time dramatically. It is not exactly the same as standard Darwinian evolution through natural selection, but it is very much a type of evolution.

Organisms and their environments continually co-evolve. Each is profoundly changing the other.

This reciprocal transformation is responsible for many of the planet’s defining features: for our breathable atmosphere, our blue sky, our bountiful oceans, our fertile soils. This is all because of life and because of the way that life has changed the planetary environments. These are not default features of the planet. Life has created them over time.

Brian Resnick

What is the most stunning example of how life has actually changed the planet?

Ferris Jabr

In the beginning, Earth had essentially no free oxygen in its atmosphere, and the sky was probably a hazy orange. And when cyanobacteria began to oxygenate the atmosphere through the innovation of photosynthesis, the sky probably started shifting toward the blue part of the spectrum.

The entire chemistry of the planet changed. I mean, you suddenly had an oxygen-rich environment, whereas before it was an oxygen-poor environment. That changes absolutely everything.

Brian Resnick

Okay, so to get back to what you were saying before, it’s not that Earth evolves in the same way that organisms evolve. But it evolves with a different mechanism, is that right?

Ferris Jabr

Evolutionary biologists will say a planet cannot evolve because it doesn’t have a cohesive genome. There’s no genetic inheritance going on; there’s no sexual reproduction going on.

But there are analogous processes by which changes are passed down from generation to generation that are not genetically encoded.

If we think about a bunch of large mammals, they’re transforming their landscape by walking through it with their immense hefts. They’re tearing down vegetation. They’re digging in, uprooting things. They’re changing the landscape.

Those changes persist. And so their descendants now are evolving in a new environment changed by their predecessors. These environmental changes are not themselves genetically encoded, but they are being passed from generation to generation, and they are inevitably influencing the evolution that follows.

Brian Resnick

If a fundamental part of life is that it changes the world in which it exists, how are we different for accelerating the climate crisis? Because you look at the history of the Earth and you say, well, life has powerfully changed it. Who’s to say what we’re doing is necessarily not a natural process?

Ferris Jabr

It’s simultaneously humbling and empowering to recognize ourselves as simply the latest chapter in this long evolutionary saga of life changing the planet. It is a basic property of life to change its environment, and we’re not an exception to that.

But I do think there’s a major distinction between what our species has done and what has happened before in terms of the combined scale and speed and the variety of our changes to the planet. I don’t think there’s any species or creature before us that has changed the planet on such a large scale so quickly and in so many different ways simultaneously.

We have radically altered the atmosphere, the oceans, and the continents. We’ve done it in a couple of centuries. That’s a huge part of the reason for why the crisis we’re going through right now is a crisis. It has so much to do with the scale and the speed of it.

Brian Resnick

What’s part four of your argument?

Ferris Jabr

This co-evolution, on the whole, has amplified the planet’s capacity for self-regulation and enhanced Earth’s resilience. Earth has remained alive for, you know, around 4 billion years, despite repeated catastrophes of unfathomable scale, unlike anything that we have ever experienced in human history. We have to account for that resilience, for that incredible persistence through time.

It is not a deliberate thing. You know, it is not a conscious or collaborative thing. It is simply an inevitable physical process, just as evolution by natural selection is an inevitable physical process.

Even in the mass extinctions in Earth’s history, life recedes to its most fundamental and most resilient forms: microbes. And then life sprouts from there.

Brian Resnick

Are you sure you’re right about all this? Is the scientific community coming around to accept this notion that Earth is indeed alive?

Ferris Jabr

I mean, this book is my personal synthesis, an argument. You know, this is my viewpoint. This is how I have come to see the Earth. There are scientists who agree with me, but I would not say that this is the consensus of modern mainstream science. I think the statement that Earth is alive remains quite controversial and provocative. However, everything else we’ve been talking about, the co-evolution of life and environment, the fact that life has profoundly changed the planet. These are all well-accepted points.

Brian Resnick

Which part are you most likely wrong about? Or which part do you feel like has the most room for doubt?

Ferris Jabr

We do not have a precise, universally accepted definition of life. We haven’t explained it on the most fundamental level. Like 100 years from now, will we have a fundamental explanation for life that we’re missing right now? And if we do, will that make thinking of planets as alive defunct? And so, I think open-mindedness is fundamental to any scientific thinking or scientific process. And we have to be open to the idea that a century from now, or even sooner, all of this will be wrong.

And that’s part of what I find thrilling: We don’t have all of the answers yet. Right? These are incredibly challenging ideas and concepts that we are still working out. If we had figured it out, then we wouldn’t be talking about the Gaia hypothesis anymore. The Gaia would have been officially dead a long time ago. But I think the reason that it remains relevant and continues to be debated means that we just haven’t figured it out yet.

Brian Resnick

Why is it useful to think of the Earth as alive?

Ferris Jabr

There’s a massive difference between thinking of ourselves as living creatures that simply reside on a planet, that simply inhabit a planet, versus being a component of a much larger living entity. When we properly understand our role within the living Earth system, I think the moral urgency of the climate crisis really comes into focus.

All of a sudden it’s not just that, oh, the bad humans have harmed the environment and we need to do something about it. It’s that each of us is literally Earth animated, and we are one part of this much larger, living entity. It’s a realization that everything that we are all doing moment to moment, day to day, is affecting this larger living entity in some way.

Brian Resnick

So, the simple point that you’re making is that we are Earth, and don’t self-harm.

Ferris Jabr

Right, exactly.

Read the full story here.
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How dry cleaning might raise the risk of cancer, and what to do about it

A new study found links between a toxic dry cleaning chemical and liver cancer. Trump officials are reconsidering an EPA plan to phase it out.

Environmental and health advocates have long sought to curb dangerous chemicals used in dry cleaning. Now a new study adds to the evidence of harms, linking a common dry cleaning chemical to liver disease and cancer.Here’s what you need to know about the risks.How dry cleaning worksDespite the name, clothes don’t stay “dry” when dry-cleaned. Instead, garments are loaded into drums and soaked in chemicals that dissolve stains.Before modern cleaning systems were developed, workers would manually move solvent-soaked garments from washer to dryer, creating a direct exposure route and increasing the chances of environmental contamination. Today, cleaners wash and dry everything in the same drum. Clothes are then pressed or steamed.What are the health risks?One of the most widely used dry cleaning chemicals is an industrial solvent called PCE, also known as tetrachloroethylene, perchloroethylene and perc. The Environmental Protection Agency considers PCE a probable human carcinogen, and it has been linked to bladder cancer, multiple myeloma and non-Hodgkin lymphoma.Follow Climate & environmentLast year, the EPA announced a new rule banning PCE for most uses and giving dry cleaners a 10-year phaseout period. The Trump administration is reconsidering this decision, according to an EPA spokesperson.But a recent study found that exposure to PCE tripled the risk of liver fibrosis, excessive scarring that can lead to liver disease and liver cancer. Researchers found that repeated exposure to PCE, which is detectable in an estimated 7 percent of the U.S. population, increased the likelihood of liver damage.“If you’ve been exposed to PCE, talk to your doctor about it,” said Brian P. Lee, associate professor of medicine at the University of Southern California and the study’s lead author.The study found that higher-income households faced the most risk from PCE exposure because they are more likely to use dry cleaning. People who work in cleaning facilities or live nearby also face an elevated risk due to prolonged exposure. Once the chemical gets into a building or the ground, it’s very difficult to remove. The EPA estimates that roughly 6,000 dry cleaners, mostly small businesses, still use PCE in the United States.Lee said the study adds to the growing list of harms associated with the chemical.Studies have also shown that PCE can linger on clothing after dry cleaning and that it builds up over time after repeated cleanings and can contaminate indoor air as it vaporizes.“We now have decades of studies confirming that these widespread dry cleaning chemicals are exposing people to unacceptable risks of cancer and other serious diseases,” said Jonathan Kalmuss-Katz, a senior attorney at the advocacy group Earthjustice. “Those harms are entirely avoidable.”Jon Meijer, director of membership at the Drycleaning & Laundry Institute International, a trade association, said the group supports the original rule passed under the Biden administration and explained that those who still use the chemical do so because of financial challenges.“It’s time for a phaseout of perchloroethylene,” Meijer said. “There are so many alternatives out there.”Safer alternativesExperts say there are plenty of alternatives to using harmful dry cleaning chemicals, but some are safer than others.Go dry-clean free: Try purchasing clothes that don’t need to be dry-cleaned. Selecting cotton blazers and other professional attire, for example, can reduce dry cleaning visits, said Tasha Stoiber, a senior scientist at the Environmental Working Group, an advocacy group. “The easiest thing is to look for professional staples that don’t need to be dry-cleaned,” Stoiber said.Hand-washing: Some “dry-clean only” garments can be delicately hand-washed in cold water with a gentle detergent specific to the particular fabric you’re using. Hanging delicate clothes to dry after a wash can avoid damage from heated air dryers.Steaming: Steam cleaning can freshen up clothes by removing odors, bacteria and small stains without needing a full wash.Commercial wet cleaning: Commercial wet cleaning relies on biodegradable detergents and water instead of toxic solvents.Liquid carbon dioxide: Experts suggest selecting dry cleaners that use liquid carbon dioxide as a solvent to remove dirt and avoid toxic chemicals.Watch out for greenwashingSome businesses advertise eco-friendly or “green” alternatives to dry cleaning. But experts warn that new chemicals can have their own downsides.Diana Ceballos, an assistant professor in the University of Washington’s Department of Environmental and Occupational Health Sciences, said that dry cleaning technology has improved dramatically and that new solvents and machinery can be more effective than PCE.Still, Cebellos said that there can be a lot of “regrettable substitution” when it comes to alternatives to PCE and that some that are billed as “safe” or “organic” could also be toxic.“Most options are far better,” Cebellos said. “But there’s a lot of greenwashing” out there, so people should ask questions and do “a little bit of research.”

Emergency Crews Respond to Ammonia Leak at Mississippi Fertilizer Plant

(Reuters) -Emergency teams responded on Wednesday to a chemical leak, possibly caused by an explosion, at a fertilizer plant in Central Mississippi...

(Reuters) -Emergency teams responded on Wednesday to a chemical leak, possibly caused by an explosion, at a fertilizer plant in Central Mississippi, according to Governor Tate Reeves and media reports. No injuries were immediately reported.A tall cloud of orange vapor could be seen rising over the facility in a photo from the scene of the plant posted online by television station WJTV, a CBS News affiliate in Jackson, Mississippi, the state capital.The governor identified the leaking chemical as anhydrous ammonia, a toxic substance that can cause irritation to the eyes and lungs.Fertilizer manufacturer CF Industries said in statement that "all employees and contractors on site at the time of the incident have been safely accounted for, with no injuries reported."It said it had notified government officials of an "incident" that occurred at its Yazoo City Complex at about 4:25 p.m. CT (2225 GMT).Reeves said in a statement posted on social media that state authorities were "actively responding to the anhydrous ammonia leak" at the plant, located about 50 miles (80.5 km) north of Jackson."Initial reports indicate the leak is due to an explosion. At this time, no deaths or injuries have been reported," the governor said.Personnel from the Mississippi Department of Environmental Quality were among various teams dispatched to the scene, WJTV reported.The governor said residents living along two nearby streets should be evacuated, while other residents in the vicinity were encouraged to shelter in place.(Reporting by Steve Gorman in Los Angeles; Additional reporting by Costas Pita in Los Angeles and Angela Christy in Bengaluru; Editing by Himani Sarkar and Stephen Coates)Copyright 2025 Thomson Reuters.

EPA Proposes Approving Fifth ‘Forever Chemical’ Pesticide

November 5, 2025 – In line with its plan to continue pesticide approvals despite the government shutdown, the Environmental Protection Agency (EPA) announced this week that it will register a new weedkiller for use in corn, soybean, wheat, and canola fields. The herbicide, epyrifenacil, is the fifth pesticide set to be approved by the agency […] The post EPA Proposes Approving Fifth ‘Forever Chemical’ Pesticide appeared first on Civil Eats.

November 5, 2025 – In line with its plan to continue pesticide approvals despite the government shutdown, the Environmental Protection Agency (EPA) announced this week that it will register a new weedkiller for use in corn, soybean, wheat, and canola fields. The herbicide, epyrifenacil, is the fifth pesticide set to be approved by the agency within the last few months that fits into the group of chemicals called PFAS (per- and polyfluoroalkyl substances), based on a commonly used definition. And the agency is moving fast. The first pesticide was proposed for registration in April; that pesticide, called cyclobutrifluram, was finalized today. PFAS are linked to a wide range of health harms and are commonly called “forever chemicals” because they don’t break down easily and they accumulate in soil and water. In 2023, however, the EPA officially adopted a narrower definition. With the proposed approval of epyrifenacil, the agency for the first time has waded into the debate over which pesticides are PFAS and whether concerns voiced over other recent registrations of similar pesticides are warranted. In its announcement, the agency noted that epyrifenacil “contains a fluorinated carbon” and directed the public to a new website where it lays out its position on pesticides that contain fluorinated carbons. Whether those chemicals fit the definition of PFAS doesn’t matter, the agency argues, because under the law, the EPA evaluates the risks of each chemical individually. “Regardless of whether a chemical meets a specific structural definition or is part of a category or class of chemicals, the Agency utilizes a comprehensive assessment process under [the Federal Insecticide, Fungicide, and Rodenticide Act] to evaluate the potential risks of pesticide use,” it said. “This robust, chemical-specific process considers both hazard and exposure in determining whether the pesticide under review may pose risk to human health or the environment.” Epyrifenacil was developed by Japan-based Sumitomo Chemical, which owns Valent U.S.A. in the U.S. It’s one of a new class of herbicides designed to help farmers kill weeds that have developed resistance to popular chemicals like glyphosate. It’s also specifically designed for farmers to spray on cover crops and in no-till systems to prep fields for planting. The pesticide industry has lobbied in recent years to get the EPA to approve new chemicals to address what it calls an “innovation backlog.” Nathan Donley, environmental health science director at the Center for Biological Diversity, said in a statement that an “office run by chemical lobbyists” is whitewashing what is already known about the risks of PFAS. “Not only did the pesticide industry get a proposed approval of its dangerous new product,” he said, “but it also got a shiny new government website parroting its misleading talking points.” (Link to this post.) The post EPA Proposes Approving Fifth ‘Forever Chemical’ Pesticide appeared first on Civil Eats.

Yeast on Mars could survive, unique new research shows

A new study from scientists in India shows that yeast could survive on Mars, tolerating both shockwaves from impacts and toxic perchlorate salts. The post Yeast on Mars could survive, unique new research shows first appeared on EarthSky.

View larger. | Saccharomyces cerevisiae, also known as baker’s yeast. Could yeast survive on Mars? A new study from scientists in India shows how yeast on Mars could, in fact, tolerate the red planet’s harsh conditions. Image via Mogana Das Murtey/ Patchamuthu Ramasamy/ Wikimedia Commons (CC BY 3.0). Yeasts are single-celled microorganisms of the fungus kingdom. Could yeast survive on Mars? A new study from researchers in India shows that some of them would be able to. The yeast cells were exposed to high-intensity shockwaves and toxic perchlorate salts in lab tests. Many of them survived. Science matters. Wonder matters. You matter.Join our 2025 Donation Campaign today. Yeast on Mars When it comes to earthly organisms that could conceivably survive on Mars’ harsh surface, the options are seemingly few. But scientists in India found one that just might be able to: yeast. Researchers at the Indian Institute of Science (IISc) and the Physical Research Laboratory (PRL) said on October 24, 2025, that simple yeast cells could survive shockwaves from meteorite impacts and highly toxic perchlorate salts. The research team used simple baker’s yeast (Saccharomyces cerevisiae) for their experiments. Yeasts are tiny, single-celled microorganisms that are classified as part of the fungus kingdom. There are more than 1,500 species currently known. The researchers published their peer-reviewed findings in the journal PNAS Nexus on October 14, 2025. Shockwaves and salts To find out if yeast could actually survive the extreme conditions on Mars, the researchers exposed their yeast samples to two kinds of environmental factors. These were shock waves, mimicking meteorite impacts or marsquakes, and perchlorate salts, which are highly toxic and common on Mars. The shockwaves reached mach 5.6 in intensity. In addition, the researchers exposed the yeast cells to 100 mM sodium perchlorate. This was done both in isolation from the shockwaves and in combination with the shockwaves. These unique experiments had not been done before, explained lead author Riya Dhage, a project assistant at the Indian Institute of Science: One of the biggest hurdles was setting up the HISTA tube to expose live yeast cells to shock waves – something that has not been attempted before – and then recovering yeast with minimum contamination for downstream experiments. What makes this work unique is the integration of shock wave physics and chemical biology with molecular cell biology to probe how life might cope with such Mars-like stressors. Could life survive on Mars? Yeast offers a clue #EarthDotCom #EarthSnap #Earth — Earth.com (@earthdotcom.bsky.social) 2025-10-25T13:25:36Z Yeast on Mars survived in simulations Remarkably, many of the yeast cells did survive. Notably, this was the case whether they were tested with the shockwaves and perchlorates together or separately. The growth of the cells did slow down, but the stressful and toxic conditions didn’t kill them. Co-author Purusharth Rajyaguru said: We were surprised to observe yeast surviving the Mars-like stress conditions that we used in our experiments. We hope that this study will galvanize efforts to have yeast on board in future space explorations. So, how did they survive? The researchers said that ribonucleoprotein (RNP) condensates, produced by the cells, likely saved them. Those are tiny structures that have no membranes. They help protect and reorganize mRNA (messenger RNA) when the cells are under stress. mRNA is a type of single-stranded RNA (ribonucleic acid) involved in protein creation. In fact, the shockwaves triggered the creation of two types of RNPs, called stress granules and P-bodies. The perchlorates, meanwhile, caused the formation of just P-bodies. In some cases, however, the yeast cells weren’t able to form those structures. And consequently, those cells didn’t survive. View larger. | This image shows yeast cells with the protective RNP condensates in them (yellow dots). Image via Riya Dhage/ Indian Institute of Science. Lead author Riya Dhage and co-author Purusharth Rajyaguru at the Indian Institute of Science. Image via Swati Lamba/ Indian Institute of Science. Possible biosignatures The fact that many of the yeast cells did survive was surprising, and shows that similar kinds of cells could indeed survive on Mars in some instances. With that in mind, the protective RNP condensates might actually be good biosignatures – signs of life – when searching for evidence of extraterrestrial lifeforms. Dhage said: What makes this work unique is the integration of shock wave physics and chemical biology with molecular cell biology to probe how life might cope with such Mars-like stressors. Bottom line: A new study from scientists in India shows that yeast could survive on Mars, tolerating both shockwaves from impacts and toxic perchlorate salts. Source: Ribonucleoprotein (RNP) condensates modulate survival in response to Mars-like stress conditions Via Indian Institute of Science Read more: Life on Mars? Odd rings and spots tantalize scientists Read more: Prototaxites: Oldest giant organisms a lost kingdom of life?The post Yeast on Mars could survive, unique new research shows first appeared on EarthSky.

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