Talking Science Podcast
Gravity – The Weakest Force in Charge of Everything
Stick a small magnet on the fridge and use it to pick up a paperclip. In that tiny moment, a scrap of magnetised metal has beaten the pull of the…
Articles
Physics
Why the Sky Is Blue but Sunsets Are Red
Look up on a clear day and the sky is blue. Look at the same sky an hour before dark and the horizon turns orange and red. Nothing about the air has…
Friction – The Force That Wears the World Down
Try walking across a freshly mopped floor in socks and you get a sudden lesson in something you rely on every second of the day. Friction is why your…
Pressure – From the Deep Sea to Diamond Anvils
A sealed packet of chips on a plane at cruising altitude puffs up like a pillow. Your ears pop on the way back down. At home, a pressure cooker turns…
Time Dilation – Why GPS Satellites Disagree With Your Watch
You probably trust your phone to know exactly where you are. What you may not realise is that the satellites making this possible carry clocks that…
Heisenberg’s Uncertainty Principle
Imagine trying to pin down exactly where a tiny particle is and, at the same moment, exactly how fast it is moving. Common sense says that with a good…
The Four Fundamental Forces
Everything that ever happens, a leaf falling, a magnet clinging to a fridge, the sun pouring out light, a radioactive atom quietly transforming, comes…
Schrödinger’s Cat and Quantum Superposition
A cat sealed in a box, somehow both alive and dead at the same time, waiting for someone to look inside before it settles on being one or the other.…
The Higgs Boson – The Particle That Gives Mass
For almost half a century, physicists chased a ghost. They had built a beautiful theory describing the tiny building blocks of the universe, but it…
Atoms – What Everything Is Made Of
Pick up anything at all, this page, a cup of coffee, your own hand, and ask a simple question: if you kept cutting it into smaller and smaller pieces,…
Electricity and Magnetism – One Force, Two Faces
Rub a balloon on your hair and it clings to the wall. Hold two magnets the wrong way round and they shove each other apart with an invisible push. For…
Lasers – Light in Lockstep
Point a flashlight at a wall and the beam softens and spreads, a fuzzy pool of glow. Point a laser at the same wall and you get a crisp, brilliant…
Light – Wave, Particle, or Both?
Light is the most familiar thing in the world and one of the strangest. It lets you read this sentence, paints every sunset, and carries the warmth of…
Superconductors – Electricity Without Resistance
Imagine pushing a shopping cart that, once you get it rolling, never slows down. No friction, no drag, no need to push again. It simply keeps gliding…
Nuclear Fusion – The Star in a Bottle
Every warm afternoon you have ever enjoyed was paid for by a furnace ninety-three million miles away. The Sun does not burn like a campfire. It fuses.…
The Large Hadron Collider – Smashing Atoms to Understand Everything
Deep beneath the border of France and Switzerland lies the largest and most complex machine humanity has ever built. It is a ring some seventeen miles…
Entropy and the Arrow of Time
Drop a glass and it shatters; you never see the pieces leap back together. Stir milk into coffee and it blends; it never unmixes on its own. Time, in…
Antimatter – The Mirror Universe
It sounds like the stuff of science fiction: a mirror version of ordinary matter that destroys anything it touches in a flash of pure energy. But…
The Standard Model – The Universe’s Ingredient List
Every recipe has an ingredient list, and the universe is no exception. Strip away the galaxies, the planets, the oceans, and your own body, and you…
Einstein’s Relativity – Time Is Not What You Think
We treat time as the one thing we can count on. A second is a second, whether you are racing down a motorway or dozing in a chair, and a clock in…
Quantum Mechanics – The Rules That Make No Sense
Imagine a world where a single particle can be in two places at once, where looking at something changes it, and where the future is ruled not by…