PBS NewsHour

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European perch. Photo courtesy of Wikimedia Commons. A study released on Friday revealed that young fish live longer after being exposed to anti-anxiety medicine concentrated in sewage runoffs. Past studies on the consequences of other compounds...
File photo of an F/A-18C aboard the USS George HW Bush U.S. Photo by Navy via Getty ImagesNEW DELHI — The U.S. launched its first airstrikes into Iraq Friday as Defense Secretary Chuck Hagel warned the U.S. military has enough intelligence to...
WASHINGTON — Federal aviation authorities are prohibiting U.S. airlines and other commercial carriers from flying over Iraq, saying hostilities there could threaten safety. The FAA announced the ban Friday, citing the “potentially...
The World Health Organization on Friday declared an international public health emergency in the wake of West Africa’s Ebola outbreak. The virus has claimed 932 lives since March, said the United Nation’s public health arm. During a news...
After analyzing thousands of webcam snapshots of landscapes in various weather conditions, computer scientists at Brown University have developed a system that can automatically change the appearance of weather in nearly any outdoor photo. With...
U.S. Secretary of State John Kerry, left, attends a press conference with Afghani presidential candidates Ashraf Ghani Ahmadzai, center, and Abdullah Abdullah, right, ahead o the second round of presidential election in Kabul, Afghanistan on Friday...