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Leeches - July 2008A century after falling out of favor among doctors, medicinal leeches are back in hospitals, sucking away on patients' wounds.
The Search for ET - July 2008Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?
Stem Cells Breakthrough - July 2008Three separate teams overcome a biomedical hurdle—creating stem cells without the use of human embryos.
Profile: Edith Widder - July 2008Meet a marine biologist and explorer who has engineered new ways to spy on deep-sea creatures.
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