We often talk about living on a blue planet, but when we think we’re talking about the ocean we’re generally only discussing what’s in it: fish, whales, pollution and ships. But that is to miss the biggest story on Earth, because it’s the water itself that sets the scene for everything else. This lecture will outline how the ocean engine works – its internal anatomy, how the components move, and how this engine has directly influenced our history and culture.

This lecture was recorded by Professor Helen Czerski on the 30th of October 2025 at Bernards Inn Hall, London

Dr Helen Czerski is a physicist and oceanographer with a passion for science, sport, books, creativity, hot chocolate and investigating the interesting things in life.

She is an Associate Professor at the Department of Mechanical Engineering at University College London and her research focus is the physics of breaking waves and bubbles at the ocean surface. These bubbles change underwater sound and light, help transfer gases from ocean to atmosphere (helping the ocean breathe) and also eject ocean material into the air. She has spent months working on research ships in the Antarctic, the Pacific, the North Atlantic and the Arctic, and is an experienced field scientist.

Helen has been a regular science presenter on the BBC for 15 years, covering the physics of the natural world in BBC2 landmark documentaries (including ‘Orbit’, ‘Operation iceberg’ and ‘Supersenses’), and the physics of everyday life in a range of BBC4 documentaries (including ‘From ice to fire: The incredible science of temperature’, ‘Sound waves: The symphony of physics’, and ‘Colour: The spectrum of science’, along with many others). She currently co-hosts BBC Radio 4’s flagship climate and environment programme Rare Earth.

Helen's first book Storm in a Teacup won the Italian Asimov Prize and the Louis J. Battan Author prize from the American Meteorological Society. Blue Machine won the Wainwright Prize for Conservation Writing. She was awarded the Institute of Physics Gold Medal in 2018 for her work on physics communication, and an Honorary Fellowship of the British Science Association in 2020. She has been a Trustee of Royal Museums Greenwich since 2018, and was one of the 2020 Royal Institution Christmas Lecturers, giving her Lecture on the topic of the ocean.

The transcript of the lecture is available from the Gresham College website: https://www.gresham.ac.uk/watch-now/liquid-engine

Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham College's mission, please consider making a donation: https://www.gresham.ac.uk/get-involved/support-us/make-donation/donate-today

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China has important islands of technological excellence, even dominance, but these islands exist in a sea of macroeconomic imbalances and headwinds. Xi Jinping is adamant that by focusing on technology, and other aspects of national security, China can hold sway in the global system and determine global governance. Many western economists and even some in China are not so sure, choosing to wonder if the government has the political capacity to address deep-seated economic problems.

This lecture was recorded by George Magnus on the 3rd of November 2025 at Barnard’s Inn Hall, London.

George Magnus is a Research Associate at the China Centre, Oxford University, and at the School of Oriental and African Studies, London, a Member of the China Foresight Forum at LSE IDEAS, and an advisory board member of the China Observatory, a non-partisan initiative at the Council on Geostrategy.

The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/watch-now/china-economics

Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: https://gresham.ac.uk/support/

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Do animals make music? Are the languages of whales and birds truly songs? To answer this, we must first understand what we mean by music as human animals—and how it might emerge across the animal kingdom. From Messiaen’s transcriptions of bird calls to the rhythmic gaits of horses echoing in the blues, we’ll hear how animal behaviours form an unwitting orchestra and explore whether music is uniquely human or a shared language with our animal cousins.

This lecture was recorded by Milton Mermikides on the 29th of October 2025 at LSO St Luke’s, London

Milton Mermikides is a composer, guitarist, technologist, academic and educator in a wide range of musical styles and has collaborated with artists and scientists as diverse as Evelyn Glennie, Tim Minchin, Pat Martino, Peter Zinovieff, John Williams and Brian Eno. Son of a CERN nuclear physicist, he was raised with an enthusiasm for both the arts and sciences, an eclecticism which has been maintained throughout his teaching, research and creative career.

He is a graduate of the London School of Economics (BSc), Berklee College of Music (BMus) and the University of Surrey (PhD). He has lectured, exhibited and given keynote presentations at organisations like the Royal Academy of Music, TEDx, Royal Musical Association, British Library, Smithsonian Institute and The Science Museum and his work has been featured extensively in the press. His music, research and graphic art are published and featured by Oxford University Press, Cambridge University Press, Deutsche Grammophon, Sony and more, and he has won awards, scholarships and commendations for writing, teaching, research and his charity work.

Milton is Professor of Music at the University of Surrey, Professor of Guitar at the Royal College of Music, Deputy Director of the International Guitar Research Centre, an Ableton Certified Trainer, and lives in London with his wife, the guitarist Bridget Mermikides and their daughter Chloe. He is also a Vice-Chair of Governors at Addison Primary School, a state school which foregrounds music education, offering free instrumental lessons for all on Pupil Premium.

The transcript of the lecture is available from the Gresham College website: https://www.gresham.ac.uk/watch-now/music-animals

Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham College's mission, please consider making a donation: https://www.gresham.ac.uk/get-involved/support-us/make-donation/donate-today

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