All Subjects
      All Types

        Info

        Grades

        9-12

        Accessibility

        Textual, Visual

        Permitted Use

        Stream Only


        Part of NOVA
        12 Favorites
        895 Views

        Sagan on Time Travel

        In this interview from NOVA, astronomer, author, and science popularizer Carl Sagan offers wide-ranging thoughts on time travel. He explains what paradox means in the context of time travel and why time travel is consistent with natural laws. He also offers reasons why we haven't met any time travelers and describes theoretical natural phenomena like wormholes that may one day be the means for time travel.

        Learn more here.

        Contributor:
        Funder:
        Producer:

        You must be logged in to use this feature

        Need an account?
        Register Now