Video: How do we know the age of the Earth?

The Earth is 4.565 billion years old, give or take a few million years. How do scientists know that? Since there's no "established in" plaque stuck in a cliff somewhere, geologists deduced the age of the Earth thanks to a ...

Probing Question: How much has dating changed in recent years?

The economy may be struggling, but these days Cupid has found some profitable new niches. With about 95 million single adults in the United States, the online matchmaking industry is booming, to the tune of a billion dollars ...

Art exhibit pushes boundaries of online privacy

Image after image splashes on the wall of the art exhibit—a snapshot of young people laughing and drinking, a picture of an elephant, an exposed belly of a woman barely covering her breasts with one arm. The photos were ...

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