The latest national and international news, exploring the day's events from a global perspective.

Paul Murton follows in the footsteps of Scotland's first tourists. He boards a traditional gypsy caravan to travel through the Borders and up to Glasgow. Show more

The inside story of the design and construction of 'the most perfect suspension bridge in the world', and how its unique slimline structure arose by accident. Show more

As a gas cloud strayed within the gravitational reach of a black hole at the centre of the Milky Way, it was hoped we would observe a feeding supermassive black hole in action. Show more

Series looking at pioneering synthetic organ surgeon Paolo Macchiarini, who has been accused of using terminally ill patients as human guinea pigs and falsifying his science. Show more

Michael Mosley ends his look at the history of experimental psychology by exploring how experiments on abnormal brains can reveal the workings of the normal brain. Show more

Professor Marcus du Sautoy explores why we are driven to measure and quantify the world around us. He begins by telling the story of the metre and the second. Show more

A portrait of a British river, chronicling the small dramas of its wildlife. Otters, mink and kingfishers hunt their victims, as newborn chicks learn to swim. Show more

Paul Martin looks at wallpaper from the 16th century to the present. It may seem insignificant, but governments have tried to control it and it has even threatened to poison us. Show more

As a gas cloud strayed within the gravitational reach of a black hole at the centre of the Milky Way, it was hoped we would observe a feeding supermassive black hole in action. Show more