PBS NewsHour

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Solar panels fill the roofs of mausoleums at the cemetery in Santa Caloma de Gramenet, near Barcelona in 2008. Spain got 47 percent of its electricity in March 2015 from renewable sources like solar power. Credit: Gustau Nacarino/REUTERS. Solar...
U.S. President Barack Obama and Cuba’s President Raul Castro shook hands on Friday at the Summit of the Americas in Panama April 11, 2015, a symbolically charged gesture as the pair seek to restore ties between the Cold War foes. President...
Former U.S. Secretary of State Hillary Clinton speaks during a Gates Foundation event in New York, March 9, 2015. The former first lady, U.S. senator and secretary of state was expected to make her 2016 effort official Sunday with an online video....
Amazon has officially won the Federal Aviation Administration’s approval to test delivery drones in the United States. In a letter posted on the agency’s website, the FAA gave the green light as long as the drones fly within the height...
SAN ANSELMO, CA – NOVEMBER 23: A bottle of antiretroviral drug Truvada is displayed at Jack’s Pharmacy on November 23, 2010 in San Anselmo, California. A study published by the New England Journal of Medicine showed that men who took the...
Former U.S. Secretary of State Hillary Clinton speaks during a news conference at the United Nations in New York in this March 10, 2015 file photo. Clinton is making her second presidential bid. Her campaign will focus on boosting economic security...