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WGBH Science Unit

Once we find a planet that has Earth-like potential, how can we tell if there is life on it? Harvard astrophysicist Lisa Kaltenegger explains how scientists might sniff out life by looking at the planet's atmosphere. Learn more at pbs.org/nova/sciencenowVideo podcast produced and edited by Melissa Salpietra. Original footage produced by Julia Cort.NOVA is produced by WGBH in Boston. Funding for NOVA scienceNOW is provided the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, the Corporation for Public Broadcasting, and public television 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.