The Rest Is Science

What day is it, really? And who decided? What happens to time when we leave the Earth? And when might future humans be counting down to the dawn of a New Year in the middle of the day? From missing days and meddling popes to atomic clocks and vanishing centuries, Professor Hannah Fry and Michael Stevens dive headfirst into one of the slipperiest questions in science and society: what IS the time and date? On the way they trace a tiny error by Julius Caesar, a correction by Pope Gregory XIII, and how time itself has bent to human will. In the process, faiths have quarrelled, centuries have blurred or been deleted altogether and yet, we crave precision in a universe that drifts, producing clocks so exact they must pause to let the Earth turn. ------------------- For more information about Cancer Research UK, their research, breakthroughs and how you can support them, visit ⁠⁠⁠https://cancerresearchuk.org/restisscience⁠⁠⁠ Cancer Research UK is a registered charity in England and Wales (1089464), Scotland (SC041666), the Isle of Man (1103) and Jersey (247). A company limited by guarantee. Registered company in England and Wales (4325234) and the Isle of Man (5713F). Registered address: 2 Redman Place, London, E20 1JQ. ------------------- Find The Rest Is Science all over the internet by ⁠clicking ⁠here⁠.⁠ ------------------- Video Producer: Adam Thornton Video & Social: Bex Tyrrell Assistant Producer: Imee Marriott Producer: Becki Hills Senior Producer: Lauren Armstrong-Carter Head Of Digital: Samuel Oakley Exec Producer: Neil Fearn Learn more about your ad choices. Visit podcastchoices.com/adchoices

Each December millions of homes fill with the unmistakable scent of pine. It's sharp, resinous, and strangely comforting, feeling timeless…familiar…safe. But what if that smell isn’t what we think it is at all? Professor Hannah Fry and Michael Stevens follow the trail of the molecules that shape this seasonal scent. It turns out it didn’t evolve to delight, but to warn and repel. The smell of Christmas is the smell of fear. Welcome to The Rest Is Science: Field Notes. Each Thursday, Hannah and Michael rummage through their personal troves of scientific treasure to source objects and ideas that hope to expand our understanding the universe, scramble our brains, or hint at forces that are invisible to the naked eye. They’ll also be tackling your questions, so email The Rest Is Science at [email protected]. ------------------- For more information about Cancer Research UK, their research, breakthroughs and how you can support them, visit ⁠⁠https://cancerresearchuk.org/restisscience⁠⁠ Cancer Research UK is a registered charity in England and Wales (1089464), Scotland (SC041666), the Isle of Man (1103) and Jersey (247). A company limited by guarantee. Registered company in England and Wales (4325234) and the Isle of Man (5713F). Registered address: 2 Redman Place, London, E20 1JQ. ------------------- Find The Rest Is Science all over the internet by ⁠clicking here.⁠ ------------------- Video Producer: Adam ThorntonVideo & Social: Bex TyrrellAssistant Producer: Imee MarriottProducer: Becki HillsSenior Producer: Lauren Armstrong-CarterHead Of Digital: Samuel OakleyExec Producer: Neil Fearn Learn more about your ad choices. Visit podcastchoices.com/adchoices

Could Santa Clause still exist IF we stripped away the magic? If the ability to bend spacetime was gone? What conditions would Santa need to deliver a present to every human being on Earth in a single night? Hannah Fry and Michael Stevens explore the historical, geographical, and logistical realities behind these questions using population data, longitudinal lines, mathematics AND a healthy dose of Christmas curiosity to calculate the impossible routes, speeds, and time spans involved in a 12 hour gift giving bonanza at global scale as a completely average human being. Wish them luck! ------------------- For more information about Cancer Research UK, their research, breakthroughs and how you can support them, visit ⁠⁠https://cancerresearchuk.org/restisscience⁠⁠ Cancer Research UK is a registered charity in England and Wales (1089464), Scotland (SC041666), the Isle of Man (1103) and Jersey (247). A company limited by guarantee. Registered company in England and Wales (4325234) and the Isle of Man (5713F). Registered address: 2 Redman Place, London, E20 1JQ. ------------------- Find The Rest Is Science all over the internet by ⁠⁠clicking here.⁠⁠ ------------------- Video Producer: Adam Thornton Video & Social: Bex Tyrrell Assistant Producer: Imee Marriott Producer: Becki Hills Senior Producer: Lauren Armstrong-Carter Head Of Digital: Samuel Oakley Exec Producer: Neil Fearn Learn more about your ad choices. Visit podcastchoices.com/adchoices

Tucked away in old engineering kits and museum drawers is a device whose sweeping motion once captivated mathematicians and designers alike.  The ellipsograph: a mechanical tool built from sliding arms and rotating joints that were tracing flawless curves long before computers made such things effortless. While they have the appearance of an ancient curiosity, the ellipsograph’s power lies in its ability to transform abstract geometry into tangible motion on a page. Its careful movement can physically enacts the strict mathematical conditions that define an ellipsis - a shape that’s central to geometry, but also to the natural order of the cosmos. So is this object just a relic of the past? Or does it have a place in the present? As a reminder of the deceptive simplicity that rules the world around us, and the ingenuity required to understand it. Welcome to The Rest Is Science: Field Notes. Each Thursday, Hannah and Michael rummage through their personal troves of scientific treasure to source objects that expand our understanding the universe, that scramble our brains, that hint at forces we’ll never see...and, that are sometimes, just plain old cool. Expect deep dives into the science behind each pick, the spark that grabbed their attentions, and the sheer delight they get from sharing it all with you. They’ll also be tackling your questions, so email The Rest Is Science at [email protected]. ------------------- For more information about Cancer Research UK, their research, breakthroughs and how you can support them, visit ⁠⁠https://cancerresearchuk.org/restisscience⁠⁠ Cancer Research UK is a registered charity in England and Wales (1089464), Scotland (SC041666), the Isle of Man (1103) and Jersey (247). A company limited by guarantee. Registered company in England and Wales (4325234) and the Isle of Man (5713F). Registered address: 2 Redman Place, London, E20 1JQ. ------------------- Find The Rest Is Science all over the internet by ⁠clicking here.⁠ ------------------- Video Producer: Oli Oakley Video & Social: Bex Tyrrell Assistant Producer: Imee Marriott Producer: Becki Hills Senior Producer: Lauren Armstrong-Carter Head Of Digital: Samuel Oakley Exec Producer: Neil Fearn Learn more about your ad choices. Visit podcastchoices.com/adchoices

What happens when the universe throws a random curveball at one of the most precise communities on Earth? Cosmic rays high energy particles from deep space are invisible, unpredictable, and capable of interfering with electronics in ways gamers never expect. Hannah Fry and Michael Stevens explore a surprising story from the speed running community, where split-second timings and frame-perfect precision collide with the chaos of the cosmos. How did a tiny particle from a distant supernova end up altering a world record attempt? And why does this single event highlight the hidden role of chance, physics, and electronics in competitive gaming? From the science of cosmic rays to their real world impact on gaming hardware, this episode uncovers the strange intersection of the cosmos, human skill, and digital records, revealing how even the universe can play a part in our most meticulously measured achievements. Join Professor Hannah Fry and YouTube educator Michael Stevens as they uncover the strange, revealing story of the human tear: why we cry, what our tears communicate, and how this uniquely human response shapes the way we connect.-------------------For more information about Cancer Research UK, their research, breakthroughs and how you can support them, visit ⁠⁠https://cancerresearchuk.org/restisscience⁠⁠Cancer Research UK is a registered charity in England and Wales (1089464), Scotland (SC041666), the Isle of Man (1103) and Jersey (247). A company limited by guarantee. Registered company in England and Wales (4325234) and the Isle of Man (5713F). Registered address: 2 Redman Place, London, E20 1JQ.-------------------Find The Rest Is Science all over the internet by ⁠⁠clicking here.⁠⁠-------------------Video Editor: Oliver OakleyVideo & Social: Bex TyrrellAssistant Producer: Imee MarriottProducer: Becki HillsSenior Producer: Lauren Armstrong-CarterHead Of Digital: Samuel OakleyExec Producer: Neil Fearn Learn more about your ad choices. Visit podcastchoices.com/adchoices