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In the water: Arsenic's tumor-triggering mechanism discovered

Arsenic exposure has long been linked to cancer, but just how the toxic element triggers tumor growth has been unknown.

A new study, published online February 23 in the journal Cancer Research , describes for the first time the impact of arsenic on crucial signals among the body's cells—a potentially potent discovery for the 100 million people worldwide whose drinking water exceeds arsenic levels recommended by the World Health Organization...

February 23, 2010 — Katherine Harmon

Third-hand smoke contains carcinogens too, study says

Anyone walking into a smoker's abode can tell you that the traces of tobacco use don't vanish when a cigarette or cigar is extinguished. But just what happens to this "third-hand" smoke once the air has cleared—and can it still be harmful?...

February 8, 2010 — Katherine Harmon

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The Essential Guide to the Modern World

The Essential Guide to the Modern World