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Leeches - A century after falling out of favor, medicinal leeches are back in hospitals, sucking away on patients' wounds.
SETI - Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?
Stem Cells Breakthrough - Three separate teams overcome a biomedical hurdle—creating stem cells without the use of human embryos.
Profile: Edith Widder - Meet a marine biologist and explorer who has engineered new ways to spy on deep-sea creatures.
First Air Date : Jan 25, 2005
Last Air date : Nov 14, 2012
Episode : 40 Episode
Season : 6 Season
Runtime: 55:60 minutes
Studio: PBS
Country: United States of America