The Royal Society's moving image material is part of the audio visual collection which initially began as audio recordings in the early part of the 20th century. These cover events and activities initiated by the Society itself, and those undertaken by the Fellows who have deposited their papers with the Society. Royal Society activities include international scientific expeditions such as the establishing the Halley Bay base in Antarctica as part of the International Geophysical Year in 1956 -8, or to study such events as the volcanic eruption of Tristan Da Cunha. The largest part of the collection relates to the Society's named scientific prize lectures such as that by Tim Berners Lee on 'The future of the world wide web', and discussion meetings on topics of interest such as 'Energy for the Future'. Films are also deposited by Fellows with their papers, such as those by Howard Florey, made to demonstrate methods used in his development of penicillin, or filmed interviews of scientists on their achievement.