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Science

Explain that Stuff

by Chris Woodford

Chart positions today · South Africa

Not on the South Africa charts we track today.

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Latest episodes

  • ICYMI It's more fun to SUPER-compute

    May 24, 2025 · 22 min

    What makes supercomputers millions of times better than the one on your desk? Here's our quick introduction to supercomputers and massively parallel processing...

  • Flushed with success - the tech behind toilets!

    May 17, 2025 · 17 min

    Toilets are one invention we can't live without, though many people in the world unfortunately do. Do you know how your toilet really works, and how it differs from unusual varieties like macerating, vacuum, and eco-friendly composting…

  • Reinventing instruments - how music synthesizers work

    May 10, 2025 · 22 min

    If you can play an electronic keyboard, you can play not just any instrument in the orchestra but any instrument you can possibly imagine. But how exactly do keyboards - music synthesizers - work?

  • Sea change - how OTEC turns ocean energy into useful power

    May 3, 2025 · 17 min

    There's enough heat energy in the oceans to meet our energy needs many times over, but can we harness it effectively? In this week's episode, we look at OTEC (Ocean Thermal Energy Conversion) - making electricity from temperature…

  • Driving through time - a brief history of cars

    April 26, 2025 · 36 min

    How did we get from the wild horse to the horseless carriage - in other words, the modern car - in about 5000 years? Here's a half-hour, whistle-stop tour of automobile history!

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  • ICYMI: Smashing atoms - making power from nuclear fusion

    April 19, 2025 · 21 min

    Nuclear power plants make about 10 percent of the world's energy by splitting atoms apart, but they have a very mixed history. So what about nuclear fusion, a better kind of nuclear power, that joins atoms together? We explain how it…

  • Living in a material world - a quick guide to materials science

    April 12, 2025 · 20 min

    Why don't we build houses from leather or planes from glass? Many of life's problems boil down to putting the right material in the right place - which is what materials science and technology is all about.

  • Let there be light - the science of candles

    April 5, 2025 · 12 min

    A candle is an ingenious chemical factory that converts hydrocarbon molecules into light. Which part is hottest? Which is brightest? Can you burn a candle in space? Do candles make harmful pollution?

  • Why do tiny bullets do so much damage?

    March 29, 2025 · 15 min

    Today, a look at the science behind bullets - how do they work and how are they designed to do maximum damage when they hit the target?

  • Whatever happened to 3d TV?

    March 22, 2025 · 15 min

    It's just over a decade since The New York Times declared 3D TV "an expensive flop". How did it work, why didn't it catch on... and will it make a comeback in future?

  • ICYMI: What is science and why does it matter?

    March 15, 2025 · 26 min

    Science seems our best hope for making sense of the world - and ourselves - but what makes it a better bet than, say, art or religion. What exactly *is* science, anyway? What makes a scientific theory and how do you prove or disprove one?…

  • The greatest physics experiments of all time?

    March 8, 2025 · 21 min

    From Galileo to Henry Cavendish and Robert Millikan to Ernest Rutherford, here are 10 of the greatest physics experiments - and why they mattered.

Full episode archive on Apple Podcasts →

About the show

Welcome to Explain that Stuff... in podcast form! Yes, by popular request, an audio version of the easy-to-understand science website you can listen to round the house or on the move. We cover the basics of how things work, cutting-edge science, cool gadgets, and computers. Unlike other websites, the emphasis is on explaining things simply and clearly so you can actually understand them. Not masses of facts and unnecessary details. Just clear, simple explanation. We teach stuff the way a teacher would, by building out from what you know already. Please subscribe and stay tuned...