How Swine Flu Spreads

When you get the flu, viruses turn your cells into tiny factories that help spread the disease. In this animation, NPR's Robert Krulwich and medical animator David Bolinsky explain how a flu virus can trick a single cell into making a million more viruses.

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Why Leaves Really Fall Off Trees

You think you know why leaves fall off trees. Well, you're wrong. It's not the wind. It's not the cold.

newleaf Why Leaves Really Fall Off Trees

It's the trees.  They're literally cutting off their own leaves. Story at NPR

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Time Lapse From Space

While astronaut Don Pettit was living aboard the International Space Station (ISS), he used some of his off-duty time to make time lapse videos of what he was seeing outside of the ISS window. Footage courtesy of Don Pettit. Music courtesy of SYNTHAR..
Science Friday on NPR

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Candy Corn In Space

Astronauts are allowed to bring special “crew preference” items when they go up in space. NASA astronaut Don Pettit chose candy corn for his five and a half month stint aboard the International Space Station. But these candy corn were more than a snack, Pettit used them for experimentation. Footage courtesy of Don Pettit. Music courtesy of Bardo Music/South Hill Project. Produced by Flora Lichtman
Science Friday on NPR

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The Obama Tracker by NPR

President Obama has kicked off his term by making key leadership appointments, carrying out an ambitious economic plan and laying the foundation for foreign and domestic policies. NPR's Obama Tracker charts significant events and developments in the new administration, and actions the president takes as he settles into the job. obamatracker1 The Obama Tracker by NPR The Obama Tracker

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