Deep impact / Paramount Pictures and Dreamworks Pictures present ; produced by Richard D. Zanuck, David Brown ; written by Bruce Joel Rubin and Michael Tolkin ; directed by Mimi Leder.

Subjects: “…Comets Collisions with Earth Drama.…”

Last Extinction : Megabeasts' Sudden Death / Public Broadcasting Service (U.S.).

Subjects: Streaming video (Emerson users only)

60 minutes. Cosmic roulette / produced by Andy Court.

Subjects: Streaming video (Emerson users only)

Defending Planet Earth : Near-Earth Object Surveys and Hazard Mitigation Strategies / Committee to Review Near-Earth-Object Surveys and Hazard Mitigation Strategies ; Space Studies Board ; Aeronautics and Space Engineering Board, Division on Engineering and Physical Sciences, National Research Council of the National Academies.

Subjects: Full text (Emerson users only)

NOVA. Last extinction / a Nova production by Hamilton Land & Cattle, Inc. for WGBH-Boston ; WGBH Educational Foundation ; written and produced by Doug Hamilton ; associate producer: Solana Pyne.

Subjects: Streaming video (Emerson users only)

Comets and asteroids / Global Science Productions ; written and produced by Elliott H. Haimoff, Scott Stillman.

Subjects:

Legal aspects of planetary defence / edited by Irmgard Marboe ; assistant editor, Cordula Steinkogler.

Subjects: Full text (Emerson users only)