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Hunt for Alien Earths

Hunt for Alien Earths - July 2009
Astronomers may be on the brink of finding Earth-like planets beyond our solar system.

Hurricane Katrina

Hurricane Katrina - Oct. 2005
Our January 2005 segment on New Orleans' risk from hurricanes proved sadly prescient, as this update reveals.


Hurricanes - Jan. 2005
Predicting a hurricane's intensity is notoriously difficult, but new tools may make it easier.

Island of Stability

Island of Stability - Oct. 2006
Follow the decades-long quest to create the elusive element 114.

Ivory-Billed Woodpecker

Ivory-Billed Woodpecker - Jan. 2006
An enchanting bird believed extinct mysteriously reappears ... maybe.

Killer Microbe

Killer Microbe - July 2008
A relatively benign bug becomes a highly lethal pathogen, known to U.S. soldiers as Iraqibacter.


Kryptos - Jul. 2007
A coded sculpture at CIA headquarters has yet to be fully broken.

Lab Meat?

Lab Meat? - Jan. 2006
Scientists can grow edible meat in culture from a few animal cells. Bon appétit?


Leeches - July 2008
A century after falling out of favor among doctors, medicinal leeches are back in hospitals, sucking away on patients' wounds.


Lightning - Oct. 2005
Experts still aren't sure what triggers it, but they suspect cosmic rays from outer space.

Little People of Flores

Little People of Flores - Apr. 2005
The remains of three-foot-tall humans are discovered on a remote Indonesian island.

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