Scientists in Virginia are the first in the world to harvest human embryos for the sole purpose of using the stem cells for research.
Margaret Warner leads a discussion about the Republican party struggle to reach consensus about the use of stem cells in scientific research.
A background report by Susan Dentzer about the use of stem cells in scientific research.
Interior Secretary Gale Norton announced yesterday plans to open 1.47 million acres of the eastern Gulf of Mexico to oil and natural gas exploration.
Tom Bearden looks at pressure on retailers to sell recycled consumer products.
Tom Bearden looks at the air conditioning efficiency debate.
Two economists offer their perspective on the California energy crisis.
The Kennewick Man hearings resume as eight scientists sue the government to study 9,000-year-old bones that Native American tribes claim as an ancestor.
Betty Ann Bowser reports from Houston where residents are cleaning up from a deadly flood.
Over-fishing threatens marine life and seamen's livelihood.
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