Summary: Scientists have never set foot on an alien world, but that hasn't kept them from looking for life beyond our solar system. In this short video, astrophysicist Lisa Kaltenegger explains how we determine whether a far-off planet could harbor life. Video podcast produced and edited by Melissa Salpietra. Original footage produced by Julia Cort. 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, the Lockheed Martin Corporation, and PBS viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0407101. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. © WGBH Educational Foundation
