Exoplanet Clouds, Alzheimer’s Glymphatic Therapy, and Festival Brain Health: A Latitude Special with The World, The Universe And Us

Overview

This Latitude Festival special of The World, The Universe And Us brings live science discussion with astrophysicist Hannah Wakeford and neuropsychologist Catherine Loveday alongside musician Steve Pritty. The episode navigates topics from exoplanet cloud chemistry to a surprising potential non pharmaceutical Alzheimer’s therapy, and ends with a look at how festivals and music influence brain health and memory.

Key insights

• Exoplanet clouds can be mineral rather than water based on temperature, including silica and quartz cycle clouds on hot worlds.
• Inhaling 5% carbon dioxide for short periods may boost the brain’s waste-disposal glymphatic system, potentially affecting Alzheimer’s related proteins.
• Large studies link engagement with cultural activities to biomarkers of aging and brain health, suggesting arts and music support cognitive aging.
• Live discussions connect astronomy, neuroscience, and music memory with personal narratives from festival life.

Introduction and format

This episode is a special filmed at Latitude Festival, hosted by Row an Hooper and Fanny Sashay, with guests Hannah Wakeford, Catherine Loveday and Steve Pritty. The show blends live science discussion with festival atmosphere and concert memories, and features a forward looking agenda on potential Alzheimer’s therapies, cloud science on Earth and other planets, the brain benefits of festivals, and a lively exchange on memory and music.

Orcas and the sea as a stage for science

The program opens with breaking news about orca behavior in the Straits of Gibraltar, including claims that hundreds of boats have been attacked since 2020. The discussion entertains a lighter possibility that orcas act out of sport or social learning, drawing on examples of animal communication and grudge bearing in cetaceans. A related note explores how orcas feed on bluefin tuna in the strait and how other orca populations interact with different prey in other waters, such as sunfish in the Gulf of California. The segment emphasizes how observing animal behavior can illuminate the complexity of brain function and social learning in non humans.

Alzheimer’s research: CO2 inhalation and glymphatic function

The show then shifts to a striking health science finding: intermittent inhalation of five percent carbon dioxide appears to enhance the brain’s glymphatic system, a waste clearance network that operates largely during sleep. The discussion explains glymphatic clearance, beta-amyloid and tau proteins in Alzheimer’s disease, and how dilating brain vessels periodically might mimic glymphatic activity in the day. The researchers used a small study with healthy adults to show increased signals in waste related proteins in blood after CO2 exposure, interpreted as a sign of fluid clearance from the brain. The hosts emphasize that these are early findings with caveats about cognitive outcomes and the need for larger trials before clinical use. The dialogue acknowledges prior approaches to remove pathological proteins and compares pharmacological versus non drug strategies, highlighting the need to understand causality and safety for future therapies.

Clouds on Earth and on distant worlds

Astrophysicist Hannah Wakeford joins to explain Earth cloud cover and its dual cooling and warming roles. Clouds reflect sunlight and trap infrared radiation, which influences climate sensitivity, a concept tied to the ice albedo feedback and the complex interplay of atmospheric and surface processes. Wakeford explains exoplanet cloud physics by describing how planets with extreme temperatures host mineral clouds made of silicate minerals like quartz and corundum and even ruby and sapphire components at higher temperatures. She discusses how exoplanet atmospheres are studied by transit spectroscopy, noting how starlight passing through a planet’s limb encodes information about cloud particle sizes, altitudes, and composition. The conversation emphasizes how cloud formation depends on temperature, wind, and surface conditions, and how these factors shape observed spectra and climate behavior on planets far from Earth.

From lava worlds to water clouds: exoplanet diversity

Wakeford describes a class of hot exoplanets where clouds cannot be made from water droplets; instead, silicate clouds form in a quartz cycle within a dynamic atmosphere driven by intense winds. The discussion compares Earth like water clouds, Martian CO2 clouds, and the exotic silicate clouds on hot worlds. The pair also discusses the concept of stable cloud formation against gravity and wind and notes the implications for observing planets with JWST and other facilities. The segment moves toward concrete examples such as lava planets where surface magma vaporizes to form thick atmospheres that can carry silicate rain back to the planet’s surface, creating a dramatic meteorology with sapphire like droplets and glassy rains.

Arts, memory and aging: cultural engagement and epigenetic aging

In the next major section, neuropsychologist Catherine Loveday describes how culture, music, events and other leisure activities correlate with epigenetic clocks, biomarkers of aging, in a large UK cohort. The data suggest that cultural engagement can be linked to a slower pace of aging at the cellular level, even after controlling socioeconomic and lifestyle factors. The discussion clarifies that the results are correlational, not yet proof of causation, but nonetheless point to meaningful brain health benefits from arts and cultural participation. The host also explores the idea that engaging with music raises BDNF levels, supports neural plasticity, and fosters social bonding and shared experiences that have measurable physiological effects. The conversation also touches on the difference between playing music and simply listening, noting that both can benefit the brain but may engage distinct neural networks and social dynamics.

Memory, music and the neuroscience of practice

The segment shifts to Steve Prity sharing personal memory experiences and how memory works in musicians. He reflects on learning and retaining complex musical patterns across decades, the role of practice structure, and the re encoding of memories during retraining. The talk covers how memories become more self aware as we age, the reminiscence bump, and the notion that emotionally charged memories can become vivid and long lasting. Both presenters discuss how different musical contexts influence brain circuits and how social and auditory experiences can synchronize brain activity among listeners. The discussion ends with a live musical moment as Steve prepares to perform a trumpet piece dedicated to memory and to Abdul Ibrahim, a jazz pianist, as a tribute to influence of memory on performance.

Wrap up and next steps

The show closes with thanks to Latitude and Cosmic Shambles, and a call to subscribe. The hosts tease future topics and invite listeners to follow The World, The Universe And Us for more science content across astronomy, neuroscience and music. A final performance by Steve Pritty serves as a musical coda for a discussion that bridged cosmic science and human memory, symbolizing the interconnected nature of science, memory and culture.