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

The DEC has launched this urgent appeal to raise funds so they can provide life-saving food, clean water and medical supplies to people in Yemen. Presented by Clare Balding. Show more

Will Millard travels the length of the River Taff. As he reaches the end of his journey, he goes wild swimming, recounts the transformation of the docks and catches salmon. Show more

How the landscapes of America's three great mountain ranges - the Appalachians, the Rockies and the Sierra Nevada - challenged the westward push of the early pioneers. Show more

The very best in British archaeology 2016. In the north, finds include evidence for the first Roman siege in Britain and Stone Age Scottish man-made islands. Show more

Dr Jago Cooper reassesses the achievements of the Inca Empire. He begins in Peru, where new evidence challenges preconceptions about its origins and significance. Show more

Richard Clay looks for what it is that has made us scribble and scratch mementoes of our lives for over 30,000 years, from prehistoric cave paintings to contemporary street art. Show more

Scientific issues. A look at the increasing research into dogs that is giving scientists a greater understanding of humans and even helping to identify disease-causing genes. Show more

Documentary following a team of underwater archaeologists and experts as they use CGI to reveal the secrets of Pavlopetri in Greece, the world's oldest submerged city. Show more

Dr Jago Cooper reassesses the achievements of the Inca Empire. He begins in Peru, where new evidence challenges preconceptions about its origins and significance. Show more

The very best in British archaeology 2016. In the north, finds include evidence for the first Roman siege in Britain and Stone Age Scottish man-made islands. Show more