NOVA scienceNOW

John Grunsfeld, an astronomer and astronaut, says that fixing the Hubble Space Telescope will be a delicate operation. In this podcast, he explains how astronauts will have to literally let their fingers do the walking when working on satellite -- and why the gloves of their space suits will play a major role in the mission's success. Podcast produced by David Levin. Interview by Rush DeNooyer. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by the National Science Foundation and the Howard Hughes Medical Institute. Additional funding is provided by the Alfred P. Sloan Foundation. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow

NOVA scienceNOW host Neil deGrasse Tyson gives his "Cosmic Perspective" on bad news and uncertainty in science. Podcast produced by David Levin. Music by www.animalhospital.com. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by the National Science Foundation and the Howard Hughes Medical Institute. Additional funding is provided by the Alfred P. Sloan Foundation. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow

Dark matter is a cosmic enigma. We can't see it or touch it -- so what is it? We asked MIT physicist Max Tegmark about the nature of this strange substance and why it remains so mysterious. Produced by David Levin. Interview by Julia Cort. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by the National Science Foundation and the Howard Hughes Medical Institute. Additional funding is provided by the Alfred P. Sloan Foundation. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow

Dr. Judah Folkman, a pioneer in the field of cancer research, passed away in January 2008. In this podcast, he describes how a high school chemistry teacher inspired him to think big, and make unlikely connections. Podcast produced by David Levin. Music by The New You. Judah Folkman audio courtesy Oberlin College. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by the National Science Foundation and the Howard Hughes Medical Institute. Additional funding is provided by the Alfred P. Sloan Foundation. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow