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NPR looks at grocery inflation and politics in Pittsburgh, a focus of both major presidential campaigns in their quest to woo voters in must-win Pennsylvania.

Scientists have placed two seismometers 8000 feet below the ice cap at the South Pole to measure earthquakes and support tsunami alerts.

Gold -- like oil -- is crucial for Venezuela's government. NPR's Leila Fadel speaks with CNN journalist Isa Soares, who won an Emmy for her coverage of the gold trade in the country.

One of the world's leading brain research centers is shifting away from fruit flies and toward a tiny, transparent fish. The goal: to understand how brains control the behavior of an animal or human.

NPR's A Martinez discusses President Trump's speech on election security with Connecticut Rep. Jim Himes, the ranking Democrat on the House Intelligence Committee.

Republican presidential candidate Mitt Romney spent his July Fourth holiday marching in a New Hampshire parade. He also backtracked on a top adviser's statement calling the individual mandate in the Obama health care law a fee or a fine. Romney says the Supreme Court ruled that it's a tax.

For the top brass of companies such as Dell and Hewlett-Packard, talk of cyberweapons and cyberwar could be abstract. But at a classified security briefing in spring 2010, it suddenly became quite real. "We can turn your computer into a brick," government officials reportedly told the startled executives.

As the Motor City rose, it dined on a chili-topped dog that helped immigrants make it in the U.S.

Eric Schmidt told a Senate panel the company faces tough competition and isn't using its dominance in Internet search to stifle competitors. The hearing is examining whether Google is abusing its power by placing links to its own content and services at the top of search results to the disadvantage of its rivals' links.

A new study shows that it is more difficult to "move up" in America than other developed countries. In America, kids are more likely to stay at the bottom of the economic ladder if their parents had low socio- economic status. Weekends on All Things Considered host Guy Raz talks with Erin Currier, manager of the Economic Mobility Project of the Pew Charitable Trusts, about why the U.S. ranked worst for economic mobility among the countries in the study.