Space-Based Solar Power in the UK, Trust Signals on Social Media, Fever in Fish, and The Perfection Trap

Overview

The Naked Scientists explore four big ideas in science and society this week. First, the UK announces funding to explore space-based solar power, including scale estimates and practicality concerns. Second, researchers propose a new trust based engagement feature for social media to curb misinformation. Third, a novel fever study in goldfish uses behavioral heat seeking to illuminate immune function. Fourth, author Tom Curran discusses perfectionism, its rise among youth, and implications for mental health in the age of social media.

Key insights

• Space-based solar power is being piloted with government and university grants to study orbital solar arrays and microwave beaming to Earth, with potential decades long timelines and substantial financial risk.
• A new incentive based engagement model could help reduce misinformation online by rewarding users for sharing accurate information via trust signals rather than simply likes or dislikes.
• Goldfish fever research demonstrates that behaviorally induced warming can enhance immune responses and pathogen clearance, suggesting fever may provide real host survival advantages across species.
• Perfectionism is rising among young people, correlating with mental health challenges and social media dynamics; experts advocate bottom up changes and policy considerations to curb excessive perfection pressures.

Space-Based Solar Power: UK Funding and Feasibility

The podcast opens with news that the UK government has announced funding for a bid to develop solar power stations in space. Grants totaling 4.3 million pounds will be shared among eight UK universities including Cambridge, Imperial, Queen Mary, and Bristol, plus several tech companies. In a London Tech Week speech, Energy Security Secretary Grant Shapps framed space-based solar power as a bold step to boost energy security by harvesting sunlight above the atmosphere, transmitting the energy to Earth via microwaves, and feeding it into the grid. Projections suggest that by 2050 such systems could yield up to 10 gigawatts of power, equivalent to about 16 Hinkley Point C sized reactors.

To unpack the idea, the podcast interviews the UCL Energy Institute’s Mark Barrett. The plan involves a large orbiting solar array attached to a satellite, which would convert solar energy into microwaves beamed to a broad receiving area on Earth. These microwaves would be reconverted to electricity for the grid. The analysis proceeds to scale considerations: the proposed satellite could be around 2 gigawatts in generating capacity and weigh about 2,000 tonnes, much larger than the International Space Station. The discussion highlights that all components, from space grade solar panels to the robotics that would assemble them in orbit, remain unproven at this scale. The cost of delivering and maintaining thousands of tonnes of hardware in space represents a significant hurdle, with a rough estimate of 17 billion pounds of public funding to operate the first satellite, a level of risk that must be weighed against proven terrestrial renewables like solar and wind on Earth.

The conversation also compares in detail with ground-based renewables. With solar and wind capacity expanding rapidly on Earth, some argue that far easier and more reliable technologies exist today, built by private firms in competitive markets. In contrast, space-based solar power faces questions of assembly, maintenance, reliability, and mission risk when robot crews must operate thousands of kilometers from Earth. A core efficiency question concerns the practicality of beaming energy back to Earth in a way that is safe and energy efficient. The podcast notes that the first satellite might be expected around 2040, with potential to scale to hundreds of satellites if successful. A Sahara-desert based electricity transport alternative is discussed; transporting energy via long-distance terrestrial grids from climates with abundant sun remains an appealing alternative to space-based options.

The discussion then pivots to policy and funding strategy. As well as technology readiness, the need for a clear economic comparison with terrestrial renewables is emphasized. The UK inquiry into Covid and misinformation frames the timing, as well as a broader question about how public money is spent on speculative, capital-intensive projects. The episode ends this segment with a reflective point: even if space-based solar power presents huge potential, other renewables and innovations—electric vehicle batteries, heat pumps, better solar panels, and hydrogen or ammonia production—are argued to be valuable targets for funding and innovation, and the consensus remains that a cautious, evidence-based approach is prudent.

Trust Signals: Reducing Online Misinformation

The next topic centers on misinformation and social media. Laura Globig from UCL discusses how platforms are engineered for engagement rather than accuracy. With billions using social media, there is a need to reward truthfulness rather than interaction alone. The proposed solution is to add a direct trust and distrust feedback mechanism to posts alongside the standard like and dislike options. Trust would reflect reliability and truth, while distrust would punish sharing misinformation. The idea is not to replace fact checking but to reframe user incentives to encourage accurate information sharing.

Three experiments on simulated social networks tested these ideas. In the first, participants could react with trust, distrust, like, or dislike. Results showed that the new trust and distrust options prompted greater differentiation between true and false posts than the usual like/dislike buttons. In subsequent experiments, participants gained trust rewards for sharing true content and faced fewer distrust punishments when posting reliably, which in turn increased the spread of true information while reducing misinformation overall.

The podcast situates this within current policy debates, notably the Online Safety Bill in the UK, arguing that improved incentive structures could enhance the quality of online discourse without depending on external fact checkers. The discussion also covers the balance between user autonomy and platform responsibility. The educators emphasize that the approach could be attractive to platforms seeking to improve engagement quality while empowering users to contribute to more accurate information exchange. Laura Globig concludes with a cautious but hopeful note that a bottom-up shift in how users interact with information may be both practical and beneficial for public discourse.

Fever in Goldfish: Comparative Immunology

The podcast then moves to a fascinating biology study from the University of Alberta. Daniel Barida describes how fever, a common response to infection in warm-blooded animals, may carry adaptive value. In a counterintuitive approach, the researchers study fever in a cold-blooded species, goldfish, which cannot raise body temperature metabolically. Instead, goldfish move to warmer water to induce a fever-like state. This behavioral fever is used to probe how fever influences immune function and infection outcomes.

The experiment is conducted in a large tank with a precise gradient of temperatures, carefully designed by teams of engineers to maintain stable conditions over two weeks. After challenging the fish with a pathogen or vaccine, researchers observe their movement toward the warmer side during fever, returning when the fever subsides. Control groups, kept at a constant high temperature, reveal slower pathogen clearance, less efficient inflammation resolution, and poorer tissue repair compared to fish with the opportunity to seek warmth. While some bacteria like Aromonas may grow more quickly at higher temperatures, the goldfish still show better outcomes with fever allowing early immune cell recruitment and systemic immune activation. The study uses measures of white blood cell trafficking, molecules that call immune cells to the infection site, and evidence of central nervous system engagement that triggers a whole-body response. The researchers conclude that fever, shared across vertebrates, may be an evolutionarily conserved survival advantage during infection.

The hosts discuss the implication for human medicine. The shared innate immune responses across species suggest similar molecular pathways operate in humans. The question of antipyretic use becomes nuanced: while fever can be debilitating, preemptive or excessive reduction of fever may dampen beneficial immune responses. The discussion touches on public health practices around fever management during infections and vaccination, and how this could inform broader clinical guidelines. The study is published in Elife, underscoring the value of cross-species approaches to understand immunology and fever as a potential adaptive mechanism in host defense.

The Perfection Trap: Mental Health in the Age of Social Media

Tom Curran, author of The Perfection Trap, joins the program to discuss the social and psychological dimensions of perfectionism. Definitions revolve around two elements: extremely high standards and punitive self-criticism for not meeting them. Perfectionism can be internal, external, or a mix of both, and Curran notes a marked rise in perfectionism over the last few decades. He cites data indicating a 40 percent increase since 1989, with much of the rise tied to social expectations and perceived scrutiny from others on social media platforms.

Curran outlines how perfectionism correlates with mental health challenges, including anxiety and low self-esteem, due to a persistent need for external validation. He also discusses performance outcomes, noting that perfectionism is linked to psychological distress and less clear evidence of corresponding success. The online safety debate is revisited in this context, with Curran arguing that social media amplifies unattainable images of perfection, especially for young girls, intensifying pressures on self-image and self-worth. He advocates for reforms to limit exposure to unrealistically idealized lives and to encourage healthier online use that supports offline relationships and shared goals. Curran emphasizes bottom-up actions, community standards, and platform design choices that can shift social media toward constructive, relationship-building uses rather than curated perfection. The program closes with a call for continued examination of how digital environments shape identity and well-being, urging careful consideration of both regulatory approaches and user-driven culture change.

Conclusion and Credits

The Naked Scientists conclude with notes about the show’s origins at Cambridge University’s Institute of Continuing Education and sponsorships by Rolls-Royce and Spitfire. Chris Smith signs off and invites listeners to join next week for HIV coverage, while also highlighting the ongoing discussion about safe and effective energy futures and responsible information sharing online.