This Week: Dunewatching, Martian style
In the News: Mass killings explained?
New pix from Mars show sand dunes on the move. Mars has been dry for 1.5 billion years; could massive erosion be due to wind? Yes, says a new report that tracked dunes with precise new images. Surprise: dunes move as fast on Mars as on Earth! More »
Tobacco and cancer. CFCs and ozone. Vaccines and autism. And evolution through natural selection, acid rain and global warming. Why do the facts get lost in a cacophony of argument, falsehood and outright denial? A conference looks at why the media get taken for a ride, and how they can improve. More »
With space shuttles in museums, what is the near-term American plan to return to space? Can other countries or private companies fill the gap? More »
A high-pressure technique to break rocks caused an explosion of natural gas production -- and alarming reports of groundwater pollution. How does fracking work? Can it be done safely?
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Impacts and concussions can cause long-lasting, even permanent brain damage. Millions of Americans have traumatic brain injuries. Could experimental techniques help mice and people?
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Refuge is site of effort to use ultralight aircraft to guide crane chicks toward Florida wintering grounds. Dangers remain, but it's a step ahead for Americas' largest flying bird, once reduced to 21 animals.
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What did the losing World Trade designs look like? What is the significance of a city skyline?
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Why do mass killers pull the trigger? What are the warning signs of "rampage" shootings?
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