Bird flu reaches Antarctic region

Fear that the highly infectious variant of avian influenza, H5N1, would reach the Antarctic region and put isolated bird populations at risk has finally come to fruition as the first birds on Bird Island in the Atlantic Ocean have come down with the devastating illness. Science manager of the island, Ashley Bennison, explains the situation. Then, from one extreme climate to another - mummified mice have been found on the summit of volcanoes across the Andes, raising questions as to the capacity for vertebrates to survive in extreme conditions. Kevin Langergraber has been studying the Ngogo chimpanzee community in Uganda for over 20 years. Now, Kevin and colleague Brian Wood tell us how this group are experiencing something thought to be unique amongst humans (and some whales): menopause. And, how geophysicist Amir Kahn used seismic activity on Mars to understand what the core of our neighbouring planet is made of. Presenter: Roland Pease Producer: Ella Hubber Editor: Martin Smith Production Co-ordinator: Jana Bennett-Holesworth (Image: Wandering Albatross, Diomeda exulans, displaying at Cape Alexandra above Bird Sound and Bird Island in background South Georgia. Credit: Education Images/Universal Images Group via Getty Images)