Most women should wait until age 50 to get mammograms and then have one every two years, a government task force said Monday in a major reversal that conflicts with the American Cancer Society's long-standing recommendation.
The U.S. economy is in need of the Next Big Thing. And Silicon Valley investors are pointing to something called "cleantech" as a candidate for the next boom.
Over the last decade, the drinking water at thousands of schools across the country has been found to contain unsafe levels of lead, pesticides and dozens of other toxins.
A federal study finds mercury in every fish tested at nearly 300 streams across the country, a finding that underscores how widespread mercury pollution has become.
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New advice: Wait until 50 for mammograms
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