ITN's Channel 4 news correspondent Tom Clarke reports on what scientists are learning from stalagmites about the rainfall and changing weather patterns in a remote region of southwest Poland.
Correspondent Tom Bearden reports on a competition of young engineers designing eco-friendly urban centers of the future.
A short self-affirming writing exercise that took only about an hour of class time boosted struggling black junior high school students' grade point average by nearly half a point over two years, according to a new study.
President Barack Obama moved Monday to lift funding limits on embryonic stem cell research. Experts weigh how the decision fits into the president's broader approach to science.
People worldwide celebrated Charles Darwin, the "father of evolution's" 200th birthday this week, honoring his extraordinary impact on science and history. Analysts discuss the man, his legacy and the ongoing debates raging over his core theories.
By PBS NewsHour
To poets, love might be a many-splendored thing. But in neuroscientist Larry Young's lab, love is biochemistry.
Student participants in the 2008 International Genetically Engineered Machine Competition crafted biological "machines," or living organisms, using original combinations of DNA and other organic material to help tackle environmental and health problems. Tom Bearden reports.
By PBS NewsHour
Which came first, the land turtle or the sea turtle? Scientists aren't sure, but a newly-discovered fossil of a 220-million-year-old turtle seems to tip the scale toward aquatic evolution, and may help explain how turtles evolved their shells.
While Michelle Obama filled in for the Senator as he visited his ill grandmother in Hawaii, Governor Palin and Senator McCain took their message to the battleground states. Judy Woodruff reports on the latest news from the campaign trail.
NASA's Phoenix Mars lander touched down Sunday and began transmitting pictures from the northern arctic plains of Mars where scientists hope to find evidence of water and life-sustaining conditions. Mission co-leader Ray Arvidson explains.
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