Naked Scientists Podcast: Cholera Outbreaks in Africa, Oldest JWST Galaxy, and Hidden Histories of Natural History Museums

Episode overview

The Naked Scientists episode traverses public health crises, astronomical breakthroughs, and museum storytelling. Host Chris Smith chats with infectious disease experts about cholera surges in Africa, including Sudan, and how water and sanitation failures fuel outbreaks. The program also covers a UK gonorrhoea vaccination plan, the James Webb Space Telescope’s record-breaking look at the oldest known galaxy, and a behind-the-scenes look at natural history museums and the narratives they construct. Along the way, listeners get a Question of the Week on brain sensing and memory, plus space news about the Vera Rubin Observatory and Milky Way dynamics.

• Cholera outbreaks in Africa and near-term public health strategies
• Gonorrhoea vaccination and antibiotic resistance challenges in England
• James Webb Space Telescope detects a galaxy 280 million years after the Big Bang
• The role of natural history museums in shaping scientific and historical narratives

Africa cholera outbreaks and public health response

The podcast opens with Africa facing a surge in cholera cases and deaths, largely linked to contaminated water, poor sanitation, and governance gaps. Bahuma Titanji, an infectious diseases expert at Emory University, explains how Vibrio cholerae causes life-threatening dehydration and how outbreaks thrive in crowded settings such as refugee camps. The discussion highlights how conflicts in the region, including Sudan, disrupt sanitation infrastructure and force population displacement, creating conditions for explosive transmission. In terms of management, the podcast emphasizes oral rehydration salts and fluid replacement as first-line treatment, with intravenous fluids for severely ill patients when feasible. The interview also touches on the need for near-term solutions, such as vaccines, while acknowledging that supply limitations and stockpile constraints hinder rapid deployment. Prevention focuses on clean water, safe fecal disposal, and public health interventions at the community level. Public health officials call for local vaccine production and increased hygiene and sanitation investments to curb the crisis.

Gonorrhoea vaccination program in the UK

Back in the UK, the program to tackle gonorrhoea includes using a vaccine originally developed for meningitis and septicemia. Shamez Ladani and Hamish Mohammed of the UK Health Security Agency discuss a strategy that could protect thousands of people by leveraging cross-protection provided by the meningococcal vaccine. Neisseria gonorrhoeae has a history of developing resistance to antibiotics, making a vaccination program a potentially valuable tool for reducing transmission and easing the burden on sexual health services. The program plans to target high-risk groups, particularly gay and bisexual men with recent bacterial STI infections, while offering the vaccine at sexual health services with clinical discretion for broader eligibility. Early results are anticipated within 12 months, providing important data that could influence other countries facing similar challenges.

Astronomy: JWST record and Rubin Observatory

The episode moves to space science, where Mom Z14, a galaxy seen just 280 million years after the Big Bang, pushes back the timeline of early galaxy formation. Matt Bothwell explains that the galaxy’s light reveals heavy elements like oxygen and nitrogen, indicating multiple generations of star formation far earlier than previously thought. This implies a more prolific and rapidly evolving early universe than models had predicted. The discussion also revisits the Milky Way and Andromeda collision, with new dynamical models suggesting the Milky Way may not collide head-on with Andromeda in the near future but could instead become a long-standing gravitational dance with its neighbor. The Vera Rubin Observatory is poised to revolutionize time-domain astronomy with an unprecedented wide-field survey of the sky, enabling detection of moving objects and a comprehensive map of dark matter and dark energy on large scales. The interview notes Rubin’s distinctive wide-field capabilities compared with Gaia, and mentions the prototype development lineage tied to Cambridge’s Institute of Astronomy.

Natural history museums: memory and truth in display

The program then shifts to a conversation with Jack Ashby about Nature’s Memory, a book exploring how natural history museums curate and sometimes omit stories about the natural world and its history. Ashby discusses the ethical responsibilities of museums as trusted institutions that reflect political and colonial histories. The discussion centers on the choices behind what is displayed, what is left out, and how collections were assembled, often during periods of empire. A personal anecdote about two colobus monkey taxidermy specimens illustrates how display choices communicate messages and shape public understanding. The conversation underscores the need for transparency about provenance, context, and biases in science museums to preserve trust and to illuminate data that inform current conservation and restoration efforts. The discussion also highlights how museum collections can support present-day environmental and biodiversity research by linking specimen data to environmental conditions over time.

Question of the Week: senses and the brain

The episode closes with a question about how the senses are represented in the brain, focusing on vision. Neuroscientist Holly Bridge explains that sight likely occupies a substantial portion of brain real estate, estimated as a third to a half, with about 50 visual areas. The podcast also notes the integrative nature of perception, where sight, hearing, touch, and other senses work together to produce coherent experience. The answer confirms sight as the largest sensory investment in the brain and points to the complexity of mapping sensory processing onto brain regions while acknowledging the interconnectedness of sensory modalities.

Closing

The Naked Scientists wrap up with credits and a tease for next Tuesday’s discussion on improving the mental health of younger people, highlighting the show’s Cambridge origins and its association with Spitfire and Epidemic Sound for production and music.