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China, the Olympics, and the Environment
Our multimedia coverage looks at the country that now leads the world in emitting greenhouse gases. With reports on Yangtze River power, China’s first carbon-neutral city, and more.
Also: Doping at the Olympics.

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Musicophobia: When Your Favorite Song Gives You Seizures
A woman exhibits a rare kind of epilepsy triggered by music.

Fact or Fiction
Men Have a Biological Clock
Does male fertility have an expiration date?

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Astrophysicist J. Richard Gott on Time Travel
The Princeton University scientist discusses the realities and speculations of voyaging through the fourth dimension.

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