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Opinion, arguments & analyses from guest experts and from the editors of Scientific American

Untreated vision problems linked to dementia in the elderly

Elderly people with untreated poor vision are significantly more likely to suffer from Alzheimer’s disease and other forms of dementia than their clear-sighted counterparts, according to a study published online February 18 by the American Journal of Epidemiology ...

February 18, 2010 — Valerie Ross

Chronic health conditions in children are on the rise

The prevalence of chronic health conditions among children in the U.S. doubled between 1994 and 2006, according to a study published in the February 17 issue of JAMA The Journal of the American Medical Association ...

February 16, 2010 — Katie Moisse

Winter Olympic medals made from recycled e-waste

When Olympic champions are crowned at this year's winter games in Vancouver, these elite athletes will be taking home more than just gold, silver or bronze medals—they will be playing a role in Canada's efforts to reduce electronic waste...

February 12, 2010 — Larry Greenemeier

How do coronary stents work?

Former President Bill Clinton received two stents in one of his coronary arteries Thursday at a New York City hospital, according to a prepared statement by his adviser Douglas Band.

February 12, 2010 — John Matson

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The Essential Guide to the Modern World

The Essential Guide to the Modern World