Summary: Peter Gallison is a physicist and historian of science. He says that although humans may sense time as moving constantly forward, it doesn't really work that way. 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
