This episode of The Naked Scientists podcast explores several scientific breakthroughs and current affairs. It begins with an analysis of the escalating tensions between India and Pakistan over the Indus Waters Treaty, questioning the feasibility and potential impact of India restricting water flow. The discussion then shifts to cancer biology, detailing a groundbreaking study on a transmissible canine cancer that provides the first evidence of horizontal gene transfer in naturally occurring tumors, challenging long-held beliefs about cancer evolution. The program also features a Cambridge scientist who has developed a free virtual reality tool to help individuals overcome the fear of public speaking through exposure therapy. Further, an oceanographer explains her research into Santorini's submarine volcano, focusing on how hydrothermal fluid systems might influence eruption likelihood and explosivity. Finally, the "Question of the Week" segment delves into what two AIs might discuss and how multiple AIs can collaborate to solve complex problems.
The Naked Scientists: Water Wars, Cancer Genes, VR Therapy, Volcanoes, and AI Chat
00:01:11 The Indus Waters Treaty Tensions: International security director Sajjan Gohel discusses the 1960 Indus Waters Treaty between India and Pakistan.
Recent terror attacks in Kashmir have led India to hint at restricting water flow to Pakistan from the six shared rivers (Indus, Ravi, Beas, Sutlej, Jhelum, Chenab).
Gohel explains that completely cutting off the water is not like turning off a tap but India could take actions to exert diplomatic pressure.
Such actions could severely impact Pakistan's agriculture (especially in Punjab) and exacerbate power shortages due to reduced hydroelectric generation.
The move is seen more as a political pressure tactic, with direct military action considered more probable by Gohel than a full water cut-off.
00:08:10 Groundbreaking Cancer Research: Horizontal Gene Transfer: Cambridge University's Elizabeth Murchison discusses her team's discovery concerning transmissible canine cancer.
The research investigated whether cancer cells can acquire DNA from host cells through horizontal gene transfer, a long-hypothesized but unproven phenomenon in naturally occurring tumors.
By studying an 8,000-year-old transmissible canine cancer (where cancer and host DNA are distinct), they found evidence of DNA transfer from a host dog to the cancer approximately 2,000 years ago.
This acquired DNA is actively expressing genes, providing new genetic material to the cancer cells.
This finding challenges fundamental principles of cancer biology and opens new avenues for understanding cancer evolution and potentially developing new treatments.
00:16:45 Virtual Reality for Public Speaking Phobia: Cambridge scientist Chris Macdonald introduces his virtual reality tool designed to help people overcome glossophobia (fear of public speaking).
The VR system, accessible via headset or smartphone, uses exposure therapy by immersing users in realistic speaking environments (e.g., lecture halls, stadiums with CGI or real recorded audiences).
The goal is to desensitize users and build confidence by gradually exposing them to the feared stimulus.
Initial trials have shown significant positive results, increasing confidence and reducing anxiety in participants.
The platform (virtualrealityspeaking.com) is offered for free.
00:23:55 Probing Santorini's Submarine Volcano: Isabelle Yo from the National Oceanography Centre details research on the hydrothermal systems of Santorini's caldera volcano.
The study aims to understand how fluid flow (seawater mixed with magmatic volatiles like CO2 and water) within the volcano influences the likelihood and explosivity of eruptions.
Researchers map these fluid pathways and analyze fluid composition to understand subsurface processes.
Fluid flow can be a double-edged sword: it can make eruptions less likely by allowing pressure-building volatiles to escape, or more likely if pathways become blocked or if rapid mixing of water and hot rock causes phreatic explosions.
00:29:57 AI Conversations and Collaboration: The "Question of the Week" addresses what two AIs would talk about, with insights from Mike Pound, University of Nottingham.
Large Language Models (LLMs) generate conversations probabilistically, predicting subsequent words. The "temperature" setting can influence creativity and randomness.
An example chat between two LLMs shows them discussing their processing power and human queries.
More practically, AIs can "talk" to each other in a guided way to solve complex problems by breaking them down, similar to human collaboration, leading to more effective outcomes.