Show Notes
00:00 // Welcome to the LectureUploaded 28-07-2600:41 // Fridtjof Nansen and the Mystery of the Arctic01:14 // Crossing Greenland: Nansen's First Expedition01:40 // The USS Jeannette and the Trans-Arctic Current Theory04:19 // Designing the Fram: A Ship Built Never to Be Crushed08:57 // Why the Arctic Is a Human Place, Not Just Wilderness09:58 // What's Coming: Physics, MOSAiC, and the Future of Ice10:19 // The Physics of Ice: Why Isn't It White?13:16 // Albedo: How Ice Reflects the Sun's Energy18:08 // Why Ice Floats (and Why That's Bizarre)19:15 // The Pink Hedgehog: How Sea Ice Makes Freshwater25:56 // Latent Heat: Ice as Earth's Thermal Buffer27:29 // Sea Ice vs. Glaciers vs. Icebergs: Know the Difference30:01 // Arctic vs. Antarctic: Which Holds More Ice?32:21 // Captain Scott and Antarctica's Moving Ice39:30 // Modern Exploration: The MOSAiC Expedition42:10 // What Scientists Discovered Drifting With the Ice47:30 // How Climate Change Is Transforming the Ice51:34 // Arctic Amplification and the New Geopolitical Frontier55:27 // Closing Thoughts: Ice, Choice, and the FutureWatch the Q and A here: https://youtu.be/AZAi7mIdXFwThe polar regions are still some of the most inaccessible and least touched by humans, but they are deeply linked to the rest of Earth. We will cover the history of exploring them, the challenges of measuring this environment, and the current state of knowledge about the ice at both poles. We will also cover the likely future for the polar regions – the incentives driving different actions, what science suggests about the consequences, and coming events to look out for.This lecture was recorded by Helen Czerski on the 21st of May 2026 at Barnard’s Inn Hall, LondonHelen 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 a 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/white-knightGresham 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 sup Learn more about your ad choices. Visit megaphone.fm/adchoices
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00:00 // Welcome: What Is the Real Scientific Method?Uploaded 22-09-2603:44 // A Bizarre Discovery: The Sound of a Cracking Whip06:48 // The Secret to Actually Cracking a Whip09:26 // The Mysterious Chain Fountain11:35 // Ancient Whips and Supersonic Dinosaurs14:32 // 1927: Proving Whips Break the Sound Barrier20:36 // Naive Physics: Energy, Momentum, and Where They Fail29:43 // Building the Real Mathematical Model37:40 // Simulations That Nail the Data Perfectly41:04 // Solving the Twice-the-Speed-of-Sound Puzzle47:12 // From Sperm to Octopuses: Why This Math MattersWatch the Q and A session here: https://youtu.be/LxlmVEKXa8wA cracking whip is invariably surprising. What generates such a stunning sound? In this lecture, through simple demonstrations of whips and chains on a pulley, Professor Goriely builds simple models to explain the extreme acceleration that takes place in the motion of ropes.In particular, he shows how these models have solutions that blow up to infinity and learns, like the dinosaurs did, how to tame these infinities to produce a stunning crack.This lecture was recorded by Alain Goriely on the 15th of September 2026Alain Goriely is a mathematician with broad interests in mathematical methods, mechanics, sciences, and engineering. He is well known for his contributions to dynamical systems, mathematical biology, as well as fundamental and applied mechanics. He is particularly well known for the development of a mathematical theory of biological growth, culminating with his seminal monograph The Mathematics on Mechanics of Biological Growth (2017).He received his PhD from the University of Brussels in 1994 where he became a lecturer. In 1996, he joined the University of Arizona where he established a research group within the renowned Program of Applied Mathematics. In 2010, he joined the University of Oxford as the inaugural Statutory Professor of Mathematical Modelling and fellow of St. Catherine’s College. He is currently the Director of the Oxford Centre for Industrial and Applied Mathematics.In addition, Alain has enjoyed scientific outreach based on problems connected to his research, including tendril perversion in plants, twining plants, umbilical cord knotting, whip cracking, the shape of seashells, brain modelling, and he is the author of a Very Short Introduction to Applied Mathematics (2017). His work has been recognized by a Sloan Fellowship, a Royal Society Wolfson Research Award, the Cozzarelli Prize from the National Academy of Sciences and the Engineering Medal from the Society of Engineering Sciences. He was elected as a Fellow of the Royal Society in 2022.The transcript of the lecture is available from the Gresham College website: https://www.gresham.ac.uk/watch-now/cracking-whipGresham 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 Website: https://gresham.ac.ukX: https://x.com/GreshamCollegeFacebook: https://facebook.com/greshamcollegeInstagram: https://instagram.com/greshamcollegeBluesky: https://bsky.app/profile/greshamcollege.bsky.social TikTok: https://www.tiktok.com/@greshamcollegeSupport Us: https://www.gresham.ac.uk/get-involved/support-us/make-donation/donate-today Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
Many influential leaders stress the importance of pursuing a purpose rather than choosing a career based on salary. While inspiring, such talks can sometimes seem impractical because many people find it difficult to know what their purpose is, and unrealistic given rapidly rising living costs and the view that lucrative careers are not purposeful. Uploaded 10-06-26This talk will introduce a practical framework to help you find what your purpose is, as well as explain how to pursue a career which is rewarding both intrinsically and financially.A lecture by Alex Edmans, Mercers' School Memorial Professor of Business 4 DecemberThe transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/lectures-and-events/finding-purposeGresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: https://www.facebook.com/greshamcollege Instagram: http://www.instagram.com/greshamcollege Support the show (https://www.gresham.ac.uk/get-involved/support-us/make-donation/one-donation) Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
Recent evidence about the extent of plastics and litter in our oceans has led to grassroots rejection of single-use plastics. Uploaded 11-06-26This lecture will draw on McGlade's own research (published in 2020) on plastics in our seas. She will show that banning single-use plastics is not enough to safeguard the health of our oceans, and that what is needed is a complete redesign of global production systems. She will outline ways that we can work to "conserve and sustainably use the oceans, seas and marine resources for sustainable development" in the face of unsustainable consumption and production and rapidly changing climate.A lecture by Jacqueline McGlade 28 AprilThe transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/lectures-and-events/future-of-oceansGresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: https://www.facebook.com/greshamcollege Instagram: http://www.instagram.com/greshamcollege Support the show (https://www.gresham.ac.uk/get-involved/support-us/make-donation/one-donation) Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
Mars has changed since it formed 4.6 billion years ago. When life started on Earth ~4 billion years ago, Mars was habitable too, with volcanism, a magnetic field, surface water and a thick atmosphere. Today, Mars is cold and dry, with a thin atmosphere and harsh surface. Uploaded 11-06-26In this lecture Professor Andrew Coates will discuss the search for life beyond Earth on our closest target, using the Rosalind Franklin rover. A lecture by Andrew Coates 23 SeptemberThe transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/lectures-and-events/marsGresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: https://www.facebook.com/greshamcollege Instagram: http://www.instagram.com/greshamcollege Support the show (https://www.gresham.ac.uk/get-involved/support-us/make-donation/one-donation) Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
Certain infections have a particular impact on the peripheral nerves as part of their normal disease process. Some infectious effects are predominately on the motor nerves such as polio (currently heading for eradication); these can cause weakness or paralysis. Other infections affect or invade the sensory nerves including leprosy and the common viral infection herpes zoster which initially presents as chickenpox. Some bacteria produce toxins which have powerful effects on the nerves including tetanus, diphtheria and botulinum. Uploaded 10-06-26This lecture will cover how infections can interfere with peripheral nerves and recent progress made against these debilitating diseases.A lecture by Chris Whitty, Gresham Professor of Physic 16 January 2019The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/lectures-and-events/infections-nervesGresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: https://www.facebook.com/greshamcollege Instagram: http://www.instagram.com/greshamcollege Support the show (https://www.gresham.ac.uk/get-involved/support-us/make-donation/one-donation) Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices