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While the name invokes safe havens for fish, whales and other sea life, these areas can be hard to monitor. High-profile violations, such as recent fishing fleet incursions near the Galapagos Islands and ships that “go dark” by turning off their tracking devices, have fueled concerns about just how much poaching is going undetected.

But some protected areas are successfully keeping illegal fishing out.

In a new global study using satellite technology that can track large ships even if they turn off their tracking systems, my colleagues and I found that marine protected areas where industrial fishing is fully banned are largely succeeding at preventing poaching.

What marine protected areas aim to save

Picture a sea turtle gliding by as striped butterfly fish weave through coral branches. Or the deep blue of the open ocean, where tuna flash like silver and seabirds wheel overhead.

These habitats, where fish and other marine life breed and feed, are the treasures that marine protected areas aim to protect.

A major threat to these ecosystems is industrial fishing.

These vessels can operate worldwide and stay at sea for years at a time with visits from refrigerated cargo ships that ferry their catch to port. China has an extensive global fleet of ships that operate as far away as the coast of South America and other regions.

The global industrial fishing fleet – nearly half a million vessels – hauls in about 100 million metric tons of seafood each year. That’s about a fivefold increase since 1950, though it has been close to flat for the past 30 years. Today, more than one-third of commercial fish species are overfished, exceeding what population growth can replenish.

When well designed and enforced, marine protected areas can help to restore fish populations and marine habitats. My previous work shows they can even benefit nearby fisheries because the fish spill over into surrounding areas.

That’s why expanding marine protected areas is a cornerstone of international conservation policy. Nearly every country has pledged to protect 30% of the ocean by 2030.

Big promises – and big doubts

But what “protection” means can vary.

Some marine protected areas ban industrial fishing. These are the gold standard for conservation, and research shows they can be effective ways to increase the amount of sea life and diversity of species.

However, most marine protected areas don’t meet that standard. While governments report that more than 8% of the global ocean is protected, only about 3% is actually covered by industrial fishing bans. Many “protected” areas even allow bottom trawling, one of the most destructive fishing practices, although regulations are slowly changing.

The plentiful fish in better-protected areas can also attract poachers. In one high-profile case, a Chinese vessel was caught inside the Galápagos Marine Reserve with 300 tons of marine life, including 6,000 dead sharks, in 2017. This crew faced heavy fines and prison time. But how many others go unseen?

Shining a light on the ‘dark fleet’

Much of what the world knows about global industrial fishing comes from the automatic identification system, or AIS, which many ships are required to use. This system broadcasts their location every few seconds, primarily to reduce the risk of collisions at sea. Using artificial intelligence, researchers can analyze movement patterns in these messages to estimate when and where fishing is happening.

But AIS has blind spots. Captains can turn it off, tamper with data or avoid using it entirely. Coverage is also spotty in busy areas, such as Southeast Asia.

New satellite technologies are helping to see into those blind spots. Synthetic aperture radar can detect vessels even when they’re not transmitting AIS. It works by sending radar pulses to the ocean surface and measuring what bounces back. Paired with artificial intelligence, it reveals previously invisible activity.

Synthetic aperture radar still has limits – primarily difficulty detecting small boats and less frequent coverage than AIS – but it’s still a leap forward. In one study of coastal areas using both technologies, we found in about 75% of instances fishing vessels detected by synthetic aperture radar were not being tracked by AIS.

New global analysis shows what really happens

Two studies published in the journal Science on July 24, 2025, use these satellite datasets to track industrial fishing activity in marine protected areas.

Our study looked just at those marine protected areas where all industrial fishing is explicitly banned by law.

We combined AIS vessel tracking, synthetic aperture radar satellite imagery, official marine protected area rules, and implementation dates showing exactly when those bans took effect. The analysis covers nearly 1,400 marine protected areas spanning about 3 million square miles (7.9 million square kilometers) where industrial fishing is explicitly prohibited.

The results were striking:

• Most of these protected areas showed little to no signs of industrial fishing.
• We detected about five fishing vessels per 100,000 square kilometers on average in these areas, compared to 42 on average in unprotected coastal areas.
• 96% had less than one day per year of alleged illegal fishing effort.

The second study uses the same AIS and synthetic aperture radar data to examine a broader set of marine protected areas – including many that explicitly allow fishing. They document substantial fishing activity in these areas, with about eight times more detections than in the protected areas that ban industrial fishing.

Combined, these two studies lead to a clear conclusion: Marine protected areas with weak regulations see substantial industrial fishing, but where bans are in place, they’re largely respected.

We can’t tell whether these fishing bans are effective because they’re well enforced or simply because they were placed where little fishing happened anyway. Still, when violations do occur, this system offers a way for enforcement agencies to detect them.

A reason for optimism

These technological advances in vessel tracking have the potential to reshape marine law enforcement by significantly reducing the costs of monitoring.

Agencies such as national navies and coast guards no longer need to rely solely on costly physical patrols over huge areas. With tools such as the Global Fishing Watch map, which makes vessel tracking data freely available to the public, they can monitor activity remotely and focus patrol efforts where they’re needed most.

That can also have a deterrent effect. In Costa Rica’s Cocos Island National Park, evidence of illegal fishing activity decreased substantially after the rollout of satellite and radar-based vessel tracking. Similar efforts are strengthening enforcement in the Galapagos Islands and Mexico’s Revillagigedo National Park.

Beyond marine protected areas, these technologies also have the potential to support tracking a broad range of human activities, such as oil slicks and deep-sea mining, making companies more accountable in how they use the ocean.

About the Author:

Jennifer Raynor, Assistant Professor of Natural Resource Economics, University of Wisconsin-Madison

This article is republished from The Conversation under a Creative Commons license. Read the original article.

By Fiddy Davis Jaihind Jothikaran, Hope College 

In a world where sports are dominated by youth and speed, some athletes in their late 30s and even 40s are not just keeping up – they are thriving.

Novak Djokovic is still outlasting opponents nearly half his age on tennis’s biggest stages. LeBron James continues to dictate the pace of NBA games, defending centers and orchestrating plays like a point guard. Allyson Felix won her 11th Olympic medal in track and field at age 35. And Tom Brady won a Super Bowl at 43, long after most NFL quarterbacks retire.

The sustained excellence of these athletes is not just due to talent or grit – it’s biology in action. Staying at the top of their game reflects a trainable convergence of brain, body and mindset. I’m a performance scientist and a physical therapist who has spent over two decades studying how athletes train, taper, recover and stay sharp. These insights aren’t just for high-level athletes – they hold true for anyone navigating big life changes or working to stay healthy.

Increasingly, research shows that the systems that support high performance – from motor control to stress regulation, to recovery – are not fixed traits but trainable capacities. In a world of accelerating change and disruption, the ability to adapt to new changes may be the most important skill of all. So, what makes this adaptability possible – biologically, cognitively and emotionally?

The amygdala and prefrontal cortex

Neuroscience research shows that with repeated exposure to high-stakes situations, the brain begins to adapt. The prefrontal cortex – the region most responsible for planning, focus and decision-making – becomes more efficient in managing attention and making decisions, even under pressure.

During stressful situations, such as facing match point in a Grand Slam final, this area of the brain can help an athlete stay composed and make smart choices – but only if it’s well trained.

In contrast, the amygdala, our brain’s threat detector, can hijack performance by triggering panic, freezing motor responses or fueling reckless decisions. With repeated exposure to high-stakes moments, elite athletes gradually reshape this brain circuit.

They learn to tune down amygdala reactivity and keep the prefrontal cortex online, even when the pressure spikes. This refined brain circuitry enables experienced performers to maintain their emotional control.

Creating a brain-body loop

Brain-derived neurotrophic factor, or BDNF, is a molecule that supports adapting to changes quickly. Think of it as fertilizer for the brain. It enhances neuroplasticity: the brain’s ability to rewire itself through experience and repetition. This rewiring helps athletes build and reinforce the patterns of connections between brain cells to control their emotion, manage their attention and move with precision.

BDNF levels increase with intense physical activity, mental focus and deliberate practice, especially when combined with recovery strategies such as sleep and deep breathing.

Elevated BDNF levels are linked to better resilience against stress and may support faster motor learning, which is the process of developing or refining movement patterns.

For example, after losing a set, Djokovic often resets by taking deep, slow breaths – not just to calm his nerves, but to pause and regain control. This conscious breathing helps him restore focus and likely quiets the stress signals in his brain.

In moments like these, higher BDNF availability likely allows him to regulate his emotions and recalibrate his motor response, helping him to return to peak performance faster than his opponent.

Rewiring your brain

In essence, athletes who repeatedly train and compete in pressure-filled environments are rewiring their brain to respond more effectively to those demands. This rewiring, from repeated exposures, helps boost BDNF levels and in turn keeps the prefrontal cortex sharp and dials down the amygdala’s tendency to overreact.

This kind of biological tuning is what scientists call cognitive reserve and allostasis – the process the body uses to make changes in response to stress or environmental demands to remain stable. It helps the brain and body be flexible, not fragile.

Importantly, this adaptation isn’t exclusive to elite athletes. Studies on adults of all ages show that regular physical activity – particularly exercises that challenge both body and mind – can raise BDNF levels, improve the brain’s ability to adapt and respond to new challenges, and reduce stress reactivity.

Programs that combine aerobic movement with coordination tasks, such as dancing, complex drills or even fast-paced walking while problem-solving have been shown to preserve skills such as focus, planning, impulse control and emotional regulation over time.

After an intense training session or a match, you will often see athletes hopping on a bike or spending some time in the pool. These low-impact, gentle movements, known as active recovery, help tone down the nervous system gradually.

Outside of active recovery, sleep is where the real reset and repair happen. Sleep aids in learning and strengthens the neural connections challenged during training and competition.

Over time, this convergence creates a trainable loop between the brain and body that is better equipped to adapt, recover and perform.

Lessons beyond sport

While the spotlight may shine on sporting arenas, you don’t need to be a pro athlete to train these same skills.

The ability to perform under pressure is a result of continuing adaptation. Whether you’re navigating a career pivot, caring for family members, or simply striving to stay mentally sharp as the world changes, the principles are the same: Expose yourself to challenges, regulate stress and recover deliberately.

While speed, agility and power may decline with age, some sport-specific skills such as anticipation, decision-making and strategic awareness actually improve. Athletes with years of experience develop faster mental models of how a play will unfold, which allows them to make better and faster choices with minimal effort. This efficiency is a result of years of reinforcing neural circuits that doesn’t immediately vanish with age. This is one reason experienced athletes often excel even if they are well past their physical prime.

Physical activity, especially dynamic and coordinated movement, boosts the brain’s capacity to adapt. So does learning new skills, practicing mindfulness and even rehearsing performance under pressure. In daily life, this might be a surgeon practicing a critical procedure in simulation, a teacher preparing for a tricky parent meeting, or a speaker practicing a high-stakes presentation to stay calm and composed when it counts. These aren’t elite rituals – they’re accessible strategies for building resilience, motor efficiency and emotional control.

Humans are built to adapt – with the right strategies, you can sustain excellence at any stage of life.

About the Author:

Fiddy Davis Jaihind Jothikaran, Associate Professor of Kinesiology, Hope College

This article is republished from The Conversation under a Creative Commons license. Read the original article.

By Kenneth J. Davis, Penn State 

Earth’s atmosphere contains carbon dioxide, which is good for life on Earth – in moderation. Plants use CO₂ as the source of the carbon they build into leaves and wood via photosynthesis. In combination with water vapor, CO₂ insulates the Earth, keeping it from turning into a frozen world. Life as we know it on Earth would not exist without CO₂ in the atmosphere.

Since the industrial revolution began, however, humans have been adding more and more carbon dioxide to the Earth’s atmosphere, and it has become a problem.

The atmospheric concentration of CO₂ has risen by more than 50% since industries began burning coal and other fossil fuels in the late 1700s, reaching concentrations that haven’t been found in the Earth’s atmosphere in at least a million years. And the concentration continues to rise.

Excess CO₂ drives global warming

Who cares? Everyone should.

More CO₂ in the air means temperatures at the Earth’s surface rise. As temperature rises, the water cycle accelerates, leading to more floods and droughts. Glaciers melt, and warmer ocean water expands, raising sea levels.

We are living with an increasing frequency or intensity of wildfires, heat waves, flooding and hurricanes, all influenced by increasing CO₂ concentrations in the atmosphere.

The ocean also absorbs some of that CO₂, making the water increasingly acidic, which can harm species crucial to the marine food chain.

Where is this additional CO₂ coming from?

The biggest source of additional CO₂ is the combustion of fossil fuels – oil, natural gas and coal – to power vehicles, electricity generation and industries. Each of these fuels consists of hydrocarbons built by plants that grew on the Earth over the past few hundred million years.

These plants took CO₂ out of the planet’s atmosphere, died, and their biomass was buried in water and sediments.

Today, humans are reversing hundreds of millions of years of carbon accumulation by digging these fuels out of the Earth and burning them to provide energy.

Let’s dig a little deeper.

Where do CO₂ emissions come from in the US?

The Environmental Protection Agency has tracked U.S. greenhouse gas emissions for years.

The U.S. emitted 5,053 million metric tons of CO₂ into the atmosphere in 2022, the last year for which a complete emissions inventory is available. We also emit other greenhouse gases, including methane, from natural gas production and animal agriculture, and nitrous oxide, created when microbes digest nitrogen fertilizer. But carbon dioxide is about 80% of all U.S. greenhouse gas emissions.

Of those 5,053 million metric tons of CO₂ emitted by the U.S. in 2022, 93% came from the combustion of fossil fuels.

More specifically: about 35% of the CO₂ emissions were from transportation, 30% from the generation of electric power, and 16%, 7% and 5% from on-site consumption of fossil fuels by industrial, residential and commercial buildings, respectively. Electric power generation served industrial, residential and commercial buildings roughly equally.

What fossil fuels are being burned?

Transportation is dominated by petroleum products, or oil – think gasoline and diesel fuel.

Nationwide, power plants consume roughly equal fractions of coal and natural gas. Natural gas use has been increasing and coal decreasing in this sector, with this trend driven by the rapid expansion of the shale gas industry in the U.S.

U.S. forests are removing CO₂ from the atmosphere, but not rapidly enough to offset human emissions. U.S. forests removed and stored about 920 million metric tons of CO₂ in 2022.

How US CO₂ emissions have changed

Emissions from the U.S. peaked around 2005 at 6,217 million metric tons of CO2. Since then, emissions have been decreasing slowly, largely driven by the replacement of coal by natural gas in electricity production.

Some additional notable trends will impact the future:

First, the U.S. economy has become more energy efficient over time, increasing productivity while decreasing emissions.

Second, solar and wind energy generation, while still a modest fraction of total energy production, has grown steadily in recent years and emits essentially no CO₂ into the atmosphere. If the nation increasingly relies on renewable energy sources and reduces burning of fossil fuels, it will dramatically reduce its CO₂ emissions.

Solar and wind energy became cheaper as a new energy source than natural gas and coal, but the Trump administration is cutting federal support for renewable energy and is doubling down on subsidies for fossil fuels. The growth of data centers is also expected to increase demand for electricity. How the U.S. meets that demand will impact national CO₂ emissions in future years.

How US emissions compare globally

The U.S. ranked second in CO₂ emissions worldwide in 2022, behind China, which emitted about 12,000 million metric tons of CO₂. China’s annual CO₂ emissions surpassed U.S. emissions in 2005 or 2006.

Added up over time, however, the U.S. has emitted more CO₂ into the atmosphere than any other nation, and we still emit more CO₂ per person than most other industrialized nations. Chinese and European emissions are both roughly half of U.S. emissions on a per capita basis.

Greenhouse gases in the atmosphere mix evenly around the globe, so emissions from industrialized nations affect the climate in developing countries that have benefited very little from the energy created by burning fossil fuels.

The takeaway

There have been some promising downward trends in U.S. CO₂ emissions and upward trends in renewable energy sources, but political winds and increasing energy demands threaten progress in reducing emissions.

Reducing emissions in all sectors is needed to slow and eventually stop the rise of atmospheric CO₂ concentrations. The world has the technological means to make large reductions in emissions. CO₂ emitted into the atmosphere today lingers in the atmosphere for hundreds to thousands of years. The decisions we make today will influence the Earth’s climate for a very long time.

About the Author:

Kenneth J. Davis, Professor of Atmospheric and Climate Science, Penn State

This article is republished from The Conversation under a Creative Commons license. Read the original article.

By Francesco Fedele, Georgia Institute of Technology 

Rogue waves have captivated the attention of both seafarers and scientists for decades. These are giant, isolated waves that appear suddenly in the open ocean.

These puzzling giants are brief, typically lasting less than a minute before disappearing. They can reach heights of 65 feet (20 meters) or greater and often more than twice the height of surrounding waves. Once a nautical myth, rogue waves have now been observed around the world. Because they’re so tall and powerful, they can pose a danger to ships and offshore structures.

To rethink what rogue waves are and what causes them, I gathered an international team of researchers. Our study, published in Nature Scientific Reports, sheds light on these oceanic giants using the most comprehensive dataset of its kind.

By analyzing 18 years of high-frequency laser measurements from the Ekofisk oil platform in the central North Sea, we reached the surprising conclusion that rogue waves aren’t just freak occurrences. They arise under the natural laws of the sea. They are not mysterious, but somewhat simple.

27,500 sea states

We analyzed nearly 27,500 half-hour wave records, or sea states, collected between 2003 and 2020 in the central North Sea. These records, taken every 30 minutes, describe how elevated the sea surface was compared to the average sea level. They include major storms, such as the Andrea wave event in 2007.

Under normal conditions, waves arise from wind blowing over the sea surface. It’s like when you blow over your cup of coffee and form small ripples on the surface. At sea, with enough time and space, those ripples can turn into large waves.

We focused on understanding what causes waves to suddenly go rogue and rise far above their neighboring waves. One proposed theory is based on modulational instability, a phenomenon described by complex mathematical models. I’ve revised these models in the past, as my work suggests that this theory doesn’t fully explain what causes rogue waves in the open ocean.

When waves are trapped within a narrow channel, the modulational instability theory describes their rippling movement well. However, it starts to fall apart when you look at the real ocean. In open environments such as the North Sea, waves are free to propagate from multiple directions.

To understand the difference, imagine a crowd of spectators leaving a stadium after a football game. If the exit is a long, narrow hallway with tall walls, people are forced to move in a single direction. Those at the back push forward, and some may even climb over others, piling up between the confining walls. This catastrophic pileup would resemble a rogue wave, caused by their confinement.

In contrast, if the stadium’s exit opens onto a wide field, spectators can disperse freely in all directions. They don’t push on each other, and they avoid pileups.

Similarly, researchers can generate rogue waves in a confined channel in the lab, where they obey modulational instability. But without the confinement of a channel, rogue waves usually won’t follow those physics or form the same way in the open sea.

Our team knew we had to study the open sea directly to figure out what was really going on. The real-world data my team examined from the North Sea doesn’t line up with modulational instability – it tells a different story.

It’s just a bad day at sea

We analyzed the sea state records using statistical techniques to uncover patterns behind these rare events. Our findings show that instead of modulational instability, the extreme waves observed more likely formed through a process called constructive interference.

Constructive interference happens when two or more waves line up and combine into one big wave. This effect is amplified by the natural asymmetry of sea waves – their crests are typically sharper and steeper than their flatter troughs.

Rogue waves form when lots of smaller waves line up and their steeper crests begin to stack, building up into a single, massive wave that briefly rises far above its surroundings. All it takes for a peaceful boat ride to turn into a bad day at sea is a moment when many ordinary waves converge and stack.

These rogue waves rise and fall in less than a minute, following what’s called a quasi-deterministic pattern in space and time. This type of pattern is recognizable and repeatable, but with touches of randomness. In an idealized ocean, that randomness would almost vanish, allowing rogue waves to grow to nearly infinite heights. But it would also take an eternity to witness one of these waves, since so many would have to line up perfectly. Like waiting for Fortuna, the goddess of chance, to roll a trillion dice and have nearly all of them land on the same number.

In the real ocean, nature limits how large a rogue wave can grow thanks to wave breaking. As the wave rises in height and energy, it can’t hold itself beyond a certain point of no return. The tip of the wave spills over and breaks into foam, or whitecap, releasing the excess energy.

The quasi-deterministic pattern behind rogue waves

Rogue waves aren’t limited to the sea. Constructive interference can happen to many types of waves. A general theory called the quasi-determinism of waves, developed by oceanographer Paolo Boccotti, explains how rogue waves form, both in the ocean and in other wave systems.

For example, for turbulent water flowing through a confined channel, a rogue wave manifests in the form of an intense, short-lived spike in vortices – patterns of spinning swirls in the water that momentarily grow larger as they move downstream.

While ocean waves seem unpredictable, Boccotti’s theory shows that extreme waves are not completely random. When a really big wave forms, the waves in the sea around it follow a recognizable pattern formed through constructive interference.

We applied Boccotti’s theory to identify and characterize these patterns in the measured North Sea wave records.

The giant waves observed in these records carry a kind of signature or fingerprint, in the form of a wave group, which can reveal how the rogue wave came to life. Think of a wave group like a small package of waves moving together. They rise, peak and then fade away through constructive interference. Tracking these wave groups allows researchers to understand the bigger picture of a rogue event as it unfolds.

As one example, a powerful storm hit the North Sea on Nov. 24, 2023. A camera at the Ekofisk platform captured a massive 55 foot (17 meter) rogue wave. I applied the theory of quasi-determinism and an AI model to investigate the origin of this extreme wave. My analysis revealed that the rogue event followed these theories – quasi-determinism and constructive interference – and came from multiple smaller waves repeatedly stacking together.

Recognizing how rogue waves form can help engineers and designers build safer ships and offshore platforms – and better predict risks.

About the Author:

Francesco Fedele, Associate Professor of Civil and Environmental Engineering, Georgia Institute of Technology

This article is republished from The Conversation under a Creative Commons license. Read the original article.