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Advances in the 1950s and 1960s, including unprecedented cooperation between Soviet and U.S. scientists , allowed polio to be eradicated throughout the Americas by 1994 and all of Europe in 1998. Eliminating the crippling scourge has been more difficult , however, in some parts of Africa and Asia.

Bees thrum among bright red blossoms on a spring day on Mount Diablo, near San Francisco Bay.

In the sweltering heat of an early July afternoon, Michael R. Waters clambers down into a shadowy pit where a small hive of excavators edge their trowels into an ancient floodplain. A murmur rises from the crew, and one of the diggers gives Waters, an archaeologist at the Center for the Study of the First Americans at Texas A&M University, a dirt-smeared fragment of blue-gray stone called chert

One of the pleasures of Scientific American , I’ve always thought, is that it offers armchair travelers a vicarious expedition to the exciting worlds uncovered through science. I reflected on that fact recently as I sat on the tarmac, my flight 23rd in line for takeoff at LaGuardia Airport in New York City. I was reading over this issue’s articles and again became absorbed by our cover story, “ The First Americans ,” by Heather Pringle.

For decades scholars and public health officials have known that people with greater income or formal education tend to live longer and enjoy better health than their counterparts who have less money or schooling. The trend holds true wherever researchers look--in poor countries or rich ones, in Europe, Asia or the Americas--but two notable exceptions stand out.

It’s hard to pin down the precise moment the world’s center of gravity shifted.

Catana 50 Ocean Class charter yacht ENTREPRENEURSHIP is participating in the Caribbean 1500 Cruising Rally which begins Nov.

With oddly simultaneous timing, a number of Apple's competitors have made bold statements alleging the iPad is poor in certain ways, not suited for particular uses, or even doomed to fail. You could be forgiven for thinking they're running interference because of fear. We marshall the evidence here.

The eco-friendly hybrid scooter recently passed a regulatory hurdle in the EU--the first vehicle of its kind to do so. This scooter from Suzuki, the Suzuki Burgman Fuel-Cell Scooter, recently revved closer to the showroom floor

A collection of delicate stone tools discovered on California's Channel Islands indicates that early humans in the Americas were hunting local waterfowl some 11,200 to 12,200 years ago. [More]