Welcome to SleepWise!

Tonight on SleepWise, we follow one of the quietest technological revolutions in modern history: humanity’s attempt to store electricity. From Alessandro Volta’s first crude stack of metal discs to the rechargeable batteries inside phones, cars, and power grids, this is the story of how we slowly learned to hold energy for later. We’ll drift through the experiments of Luigi Galvani and Volta, the invention of the lead-acid battery, and the breakthroughs of Stanley Whittingham, John Goodenough,

How can a machine be built when its smallest parts are far too tiny to see?Settle in for a calm journey from ordinary stone to silicon wafers, microscopic transistors, modern processors, and room-sized supercomputers. In this SleepWise episode, chipmaking is explained slowly and gently, with no formulas to solve and nothing you need to remember.Along the way, we visit the cleanroom and explore crystal growth, wafer polishing, photoresist, photolithography, ultraviolet and EUV light, etching, dep

Somewhere above every roof tonight, in the same sky the shepherds and astronomers have always watched, most of the universe is quietly missing. Not missing in the sense of hidden behind a cloud, or lost in the glare of a city. Missing in a stranger, deeper sense: unseen, unfelt by any instrument that catches light, and yet gathered in such vast quantities that entire galaxies would fly apart without it. And beyond that missing substance, everything we can see is quietly moving away from us — not

Tonight, drift into one of the largest machines humanity has ever built — the electric grid. The Invisible Journey of Electricity is a calming bedtime story for adults that follows electrical energy from its distant beginnings inside generators all the way to the quiet glow of a bedside lamp. Along the way, we travel through power stations, transformers, high-voltage transmission lines, substations, control rooms, neighbourhood distribution networks, meters, breakers, and the copper wiring hidd

Drift into the fascinating connection between music and the human brain in this calming SleepWise bedtime story. Tonight, we explore why a few familiar notes can awaken forgotten memories, why rhythm makes the body want to move, and how songs become intertwined with emotion, identity, and entire periods of our lives. Our journey follows five extraordinary pieces of music across more than two centuries. We begin with Beethoven’s Fifth Symphony, written as the composer’s hearing was gradually dis

Why do we yawn, and why can a single yawn quietly spread through an entire room? In this calming SleepWise bedtime story, we explore one of the most familiar yet surprisingly mysterious behaviours of the human body. There is nothing you need to memorize tonight. Simply settle in, listen softly, and allow the story to carry you toward sleep. We begin with the physical sequence of a yawn, from the widening jaw and deep inhalation to the brief feeling of release that follows. Along the way, we exa