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Forensics & Investigations

Nova: Mystery of a Masterpiece

Art experts investigate whether a portrait sold for about $20,000 in 2008 is actually a lost Leonardo worth millions.
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The Callie Crossley Show

The ABCs of Childhood Obesity

Learn why 17 percent of American children are now considered obese and what needs to change to reverse this public health predicament. Host Callie Crossley talks with children's health and nutrition experts. 
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Health

Fighting Dengue Fever With Legos

By Cristina Quinn
Little Devices is addressing third-world problems with a technique MacGyver would love: tweaking common toys and gadgets to defuse illness and disability. But is the approach a step backwards?

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Photographing Earth's 'Oldest' Animals

What if a dinosaur was found in Africa? Would you consider that worthy of conservation? If so, why — and why not a horseshoe crab that's even older? That's what photographer Piotr Naskrecki wants to know. - READ MORE

International Meeting On Controversial Bird Flu Research Draws Near

The scientists, journal editors and others who attend are expected to review the facts and the most pressing issues related to this specific work, rather than have a broader discussion about the possibility of international oversight of potentially worrisome biological research. - READ MORE

Drilling Team Finally Hits Antarctica's Liquid Lake

After years of trying, Russian scientists say they have drilled into an Antarctic lake that is buried beneath more than two miles of ice. They are looking for signs of life that haven't been exposed to sky in 20 million years. - READ MORE

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