Summary: Physicist Leonard Susskind says that Einstein radically changed the way we think about space, but his equations can't explain exactly what it is. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova
