young people and climate change Schwinger, Julian Solomon, A. Crilly, Andrew. moving image Berkeley, Calif University of California, Extension Media Center c2009 monographic 1 videocassette (30 min.) : sd., col. ; Discusses current experimental testing of Einstein's general theory being carried out around the world as well as in outer space. Produced for the Open University and the University of California by BBC-TV. Relativity (Physics) Space and time QC6