In the 2008 film The Dark Knight, there is a scene in which a would-be criminal decides against committing a crime after he sees the Bat Signal in Gotham City’s dark sky. The man chooses to mind his behavior since Batman could see him. But that’s in the fantastical world of comic book movies. That type of thing can’t happen in real life… right? Well, psychologists in Milan, Italy put this to the test.

In a psychological experiment, researchers from the Università Cattolica del Sacro Cuore found the sudden appearance of Batman caused people to become more altruistic. This mass change of behavior among a group has led Francesco Pagnini, Professor of Clinical Psychology at Università Cattolica, and his team to coin this prosocial behavior the “Batman Effect.”

The experiment was fairly simple. Professor Pagnini had a woman who appeared to be pregnant get onto a train with 138 people, including an observer planted to gauge the reactions of the passengers—would any of them offer their seat to her?

The second part of the experiment had the same scenario, but included a man in a Batman costume getting onto the train from another entrance. The purpose of the experiment was to see if an unexpected event, such as the appearance of a superhero, shook up people’s routines and increased awareness of the present moment.

The results of the experiment were surprisingly like a comic book. Without “Batman,” only 37.66% of the passengers offered their seats to the pregnant woman. However, 67.21% of the passengers offered their seats when an unexpected Dark Knight appeared on their subway train. In other words, Batman’s presence caused roughly twice as many people to kindly offer their seats to the pregnant woman compared to a “normal” ride. Another interesting note was that 44% of the people who offered their seats when the Caped Crusader was on the train reported not having seen anyone in a Batman outfit, suggesting that unexpected events could promote prosocial behavior even in the absence of awareness.

“Our findings are similar to those of previous research linking present-moment awareness (mindfulness) to greater prosociality; this may create a context in which individuals become more attuned to social cues,” said Professor Pagnini in a statement. “This suggests a potential mechanism through which novelty and unpredictability promote prosocial behavior, strengthening theories linking attentional shifts to increased social responsiveness.”

Pagnini didn’t rule out that Batman and what he represents played a significant factor in the experiment’s results (aside from the unexpected nature of a superhero taking the subway with regular passengers).

“It is also possible that the superhero figure enhanced the relevance of cultural values, gender roles, and norms of chivalrous help, consistent with research on the ‘priming’ effect associated with superheroes,” added Pagnini. “The figure of Batman could therefore play a prosocial priming role.”

The result of this experiment has had some psychologists offer methods for people who want to be more altruistic or improve their daily lives. It may not be a picture of Batman, but having a photo of someone you admire or aspire to be like can help motivate you towards goals that reflect who they are or what they’ve accomplished. In terms of the subway experiment, that shows that making a slight change in your routine, such as taking a different route to work or a different place to have coffee, would force your brain off of auto-pilot to take in the differences of life around you.

The result of this experiment shows that a little bit of shake-up of your usual routine could increase your awareness of what and who around you could use your help. This could help you become more of a superhero in real life (costume optional).

  • Texas engineers develop a jacket that pulls fresh drinking water out of thin air
    Photo credit: @fascinatingonX/CanvaWearing this jacket could help keep people hydrated.

    For too many, access to clean drinking water is incredibly difficult. According to the World Health Organization, over two billion people live in water-stressed areas due to pollution, climate change, or population growth. However, engineering experts in Texas have developed a possible solution: just put on a jacket.

    The engineers and researchers gathered at the University of Texas at Austin developed a prototype jacket that can pull drinking water out of thin air. The jacket could help anyone frequently in areas where drinkable water is scarce. This could be used recreationally by campers, hikers, and runners—but it could also save lives. Emergency responders, soldiers, and agricultural workers could also collect water for themselves and others simply by wearing it.

    The technology behind the jacket is similar to the materials used in netting for water harvesting of air and fog. This time, however, the idea is to collect water while also being mobile.

    “Water harvesting from air is usually imagined as a stationary device such as a box, a panel or a large sorbent bed,” said Guihua Yu, chair professor of the Cockrell School of Engineering’s Walker Department of Mechanical Engineering and Texas Materials Institute. “Here, we wanted to rethink the form of the technology. If the fabric itself can collect water from air, it opens a new direction for personal and portable water access.”

    How does this jacket collect water?

    The textile used to create the jacket was derived from a device the same team created. That device was a specially engineered hydrogel fabric made from biomass-derived materials. This hydrogel fabric takes moisture from the air and then releases it as water via condensation when it’s heated by sunlight. The water can easily be collected.

    The jacket’s textile collects moisture from the air and funnels it into detachable harvesting units. The units can be placed into a foldable collector piece where they are heated to produce water. The material and system doesn’t just absorb water like other materials. Instead, it actively converts vapor into water while functioning as a piece of protective clothing.

    The jacket is able to produce between 400 to 900 milliliters of drinkable water daily. This is a vast improvement upon other similar inventions that yielded less water and were significantly bulkier to wear. The jacket’s material could collect and produce more water over time and testing, depending on the humidity of the terrain.

    Aside from creating clothing out of the material, the researchers hope to make backpacks, tents, emergency shelters, and other outdoor gear from it. The hope is that this could create more clean water access for disaster response units and everyday people living in water-stressed areas alike.

    How much hydration do you need in the heat?

    Until water-collecting jackets are commercially available, it’s important to have drinkable water nearby at all times, especially during the summer. When out in the heat, the Center for Disease Control recommends having a drink of water before working outdoors. Then drink a cup of water every 15 to 20 minutes. This can help keep your body cool and hydrated to prevent heat stroke. That said, stay alert and stay indoors if there is a heat warning in your area.

  • Kenyan teens create award-winning, affordable car exhaust filters made with corn cobs and algae
    Photo credit: @theearthprize on Instagram/CanvaTwo 17-year-olds made a device that is helping reduce air pollution in Kenya.

    When Fredrick Njoroge Kariuki of Kenya turned 12 in 2021, he experienced incredible difficulty breathing. Doctors diagnosed him with bronchitis, explaining that his coughing and breathing issues were connected to the thick layers of exhaust fumes emitted by vehicles in the area. Five years later, the teenager teamed up with his classmate Miron Onsarigo to create an award-winning, inexpensive filter made with agricultural waste.

    While air pollution is a global concern, it is particularly an issue in Kenya. A 2024 study found that Nairobi, Kenya’s capital, had 3.7 times higher levels of particulate air pollution than the World Health Organization’s guidelines. This doesn’t just contribute to illness like Kariuki’s bronchitis. Experts estimate that the country’s air pollution is responsible for 400 to 1,400 premature deaths in Nairobi each year.

    The global environment issue was personal

    Both teens were hardened in their resolve to tackle this air pollution problem largely caused by the matatus (shared minibuses) and boda bodas (motorcycle taxis) common in urban areas.

    “The problem of air pollution was very personal to us, and that is why we started thinking about coming up with a solution,” Kariuki told Mongabay. “It was a passion before it became a project.”

    “I did not choose this problem. It chose me,” Kariuki said to Daily Nation. “Growing up in Naivasha, my bronchitis got so bad that I stopped thinking of air pollution as an environmental issue and saw it as something being committed against us.”

    “Seeing people get sick as a result of fumes from vehicles has become normal back home in Kisumu County. The ‘normal’ did not feel right to me. I wanted to do something about it,” added Onsarigo.

    Using waste products to clean the air

    With time, intelligence, and hard work, Kariuki and Onsarigo created the HewaSafi vehicle exhaust filter. The HewaSafi, which means “clean air” in Swahili, was made using locally sourced agricultural waste. The entire mechanism is made from steel mesh, copper, corn cobs, coconut shells, recycled batteries, and algae. All of these components help further filter out particles in the air straight from the exhaust pipe.

    The results of the HewaSafi were impressive. The device reduced particulate matter in the air by 93.3%. The HewaSafi also reduced carbon monoxide by 42% and absorbed 21.4% of CO2 that would otherwise be released into the atmosphere.

    Since the device was made using waste products, the HewaSafi manufacturing cost is around $126. By comparison, conventional filters of this sort typically cost around $390. So, not only is this filter effective, it’s cheap enough for more people to use.

    @urbanbetternairobi

    You breathe it every day. But how often do you think about it? Air pollution affects where we live, how we move, and who gets left behind. This Air Quality Awareness Week, swipe to see how Nairobi communities are taking action!#AirQualityAwarenessWeek #Cityzens #Cityzens4CleanAir #CleanAirNairobi #nairobi

    ♬ LET ME BE – The Second Voice

    A prize that leads to further opportunity

    The ingenuity of these two 17-year-olds won them the 2026 Earth Prize for Africa. They received $12,500 for their regional win and global attention to the HewaSafi.

    The teens hope to use the prize money and attention to further develop the HewaSafi. Using connections made through the Earth Prize, they aim to start a full line of emission control products. While they want to work with people with different budgets, their main target is to specifically cater HewaSafi filters toward public transportation vehicles.

  • The drawer problem: Why so many of us can’t let go of our old electronics, and what we can do about it
    Photo credit: Peter Dazeley/Photodisc via Getty ImagesThis look familiar?

    Think about the last smartphone, tablet or smartwatch you stopped using. Odds are it is not in a recycling bin or a new owner’s hands; it is sitting in a drawer.

    From our survey of 4,000 American consumers, we found the single most common thing people did with a device they were finished with was nothing at all: 39% simply stored it. Recycling and reselling, outcomes better for the environment, each accounted for only about 1 in 10 devices. Throwing devices in the trash claimed another 9%.

    What people do with old electronics

    Funded by the National Science Foundation, our multidisciplinary team blended our expertise in causal inferencesustainability and cybersecurity, to work on the tangled question of what people do with their consumer electronics when they’re done using them. We used statistical models to connect what people say – that is, their stated knowledge and attitudes – to what they actually did.

    Why the drawer wins

    Two main forces keep devices in the drawer. The first is anxiety about data. People who worried that recycling or reselling a device would compromise their data were 14% and 9% more likely to store it instead.

    The second force is simply not knowing how to. People who did not know where to recycle were 10% more likely to hold onto a device, and many also kept old gadgets as a perceived data backup.

    Recycling and reselling electronics are a lot easier than a lot of people think. In the U.S., the national chain Best Buy accepts devices for recycling; reselling online is convenient with vendors such as Back Market and Gazelle.

    Just be sure to wipe data before parting with a phone or computer. Also, remove the device from your account, for instance with Apple or Android. Unless you do, the device stays locked to you, and no one else can use it.

    We also compared what people intended to do with what they had actually done. This led to a telling detail: Data security worries led to people storing devices at a greater rate than they said they intended to.

    In other words, the fear of leaking personal data kicks in only when someone is facing the real decision of whether to hand off their device to a recycler or secondhand buyer.

    Getting at why people don’t recycle

    Researchers have long studied why people do or don’t recycle electronics: Convenience, awareness and incentives showed up as affecting the decision. But prior work examined recycling as the only option.

    Instead of considering the issue as a yes-or-no vote on recycling, we treat it as a comparison between different options: Storing, reselling, donating, trading in, recycling and throwing away the device in the trash. When modeling this way, trade-offs became visible.

    Knowing where to recycle, for instance, made recycling 47% more likely, but it also pulled people away from reselling, which is often the more environmentally friendly choice. You can explore the survey results in our interactive dashboards.

    Getting people to let go

    Storage is the worst of both worlds: A device sitting unused for years loses its resale value, and erasing its data only gets harder over time. The good news is that the main barriers – data concerns and not knowing where to turn – can be addressed with better information.

    We are experimenting with information interventions that walk people through their options, including how to securely wipe their data. We are testing nudges with randomized, controlled trials to test what leads people to give their old electronics a second life.

    It might be a good time to remember what old devices you’re holding onto and revisit your reasons for not letting go of them.

    This article originally appeared on The Conversation. You can read it here.

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