Great Explorations

BBC News has been given exclusive access to a priceless archive of important footage taken by young adventurers exploring parts of the world that were completely new to western eyes. These remarkable films, from the frozen mountains in the Himalayas to the searing Libyan Desert, have not seen the light of day for nearly a hundred years. As well as helping historians learn more about the past they are also giving scientists new insights into the future of our planet.