Nova | Pbs

Physicist Max Tegmark says that researchers still don't fully understand what time is. It's one of the biggest mysteries in physics. 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