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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.

A low-cost, low-effort way to test your instincts--and prove a meaningful insight--before it's too late. We all have hunches: that a new market is about to explode, that there's a problem in finance, that consumer behavior is changing

A low-cost, low-effort way to test your instincts--and prove a meaningful insight--before it's too late. We all have hunches: that a new market is about to explode, that there's a problem in finance, that consumer behavior is changing. Most people hold very strong opinions about their hunches

The meltdown started when water to cool the reactors fell to dangerously low levels four hours after a the fourth-largest recorded earthquake rattled the Fukushima Daiichi nuclear power plant .

PHILADELPHIA -- When the Allies needed a weapon terrible enough to end World War II, scientists devised the atomic bomb. When the Soviet Union hurled Sputnik into space, American scientists rallied to build the world's top space program

After more than 15 years of international climate negotiations, it has become ever more clear that all the carbon dioxide emitted to shuttle diplomats from city to city to hash out a regime to curb climate change has been largely wasted. The success of harried diplomacy in Kyoto in 1997 has given way to Japan buying its way out of emissions reductions in 2011 and refusing to sign up for more.

A decade after the fall of the soviet union in 1991, modernization is the watchword in Russia--with science as a vital means to that end. During the spring meeting of the 14 international editions of Scientific American , we gathered in Moscow, and our hosts introduced us to many of the surrounding issues. Scientific American has had a long history in this country, where it has been available in translation for 28 years

CHERNOBYL, Ukraine--Imagine a metal arch taller than the Statue of Liberty. Now picture it sliding a distance of roughly three football fields, making it the largest movable structure ever .