This video was filmed Thursday, June 23rd at the 2011 National Geographic Explorers Symposium at National Geographic Society headquarters in Washington, D.C.

Kevin Hand is a National Geographic Emerging Explorer. He is studying the possibilities for life on Jupiter's moon Europa, which is most likely covered by an ice-capped ocean.


  • Introduction: Where his interest in space comes from (00:00-01:29 min.)
  • The definition of space's "habitable zone" (01:30-03:20 min.)
  • Celestial bodies that have oceans on them: Enceladus and Europa (06:05-07:50 min.)
  • Engineering space exploration (07:51-13:04 min.)
  • Why the search for life beyond Earth is important (13:05-16:23 min.)

Strategies for Using Video in a Variety of Learning Environments

  • Have students preview several of the videos and choose the one they find most inspiring. Have students describe in writing a conversation they might have with the speaker(s).
  • Freeze the video on a relevant image. Have students observe details in the still image and jot down predictions of what the full video might be about. Discuss students' ideas before and after watching the video.
  • Pose an open-ended question before students watch the video, and have them discuss their ideas before and after in small groups.
  • Have students determine what they think the key message of this video is. Was the speaker effective in getting his or her message across?
  • Show a short clip to engage students during class, and then have students watch the full video at home and write a paragraph responding to the content or a question you give them.
  • Have students note statements that represent facts or opinions, including where it's difficult to tell the difference. What further research might help distinguish facts and opinions? How might the speaker's viewpoint compare with others' viewpoints about a topic?

moon of the planet Saturn.


moon of Jupiter.


tiny organism, usually a bacterium.


(National Aeronautics and Space Administration) the U.S. space agency, whose mission statement is "To reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind."


science of the measurement of light that is reflected, absorbed, or emitted by different materials.

tidal interaction

mutual gravitational attraction of two bodies.