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Uber-primary watcher Josh Putnam warns of extrapolating delegate counts from states that do not explicitly tie election results to the actual allocation of delegates.

While Republican presidential front-runner Mitt Romney argues that his opponents have no realistic shot at winning enough delegates to secure the nomination, the same could eventually be true for Romney if a four-way race continues. NPR takes a look at the latest delegate numbers.

See two graphs that show how we spend our money today, and how our spending patterns have changed since 1949.

Just how do trees die? It seems like a simple question, but the answer still eludes scientists. And understanding forest ecology is increasingly important as the effects of climate change begin to take root.

Climate change is exaggerating the normal swings in weather. For the American Southwest, that means more intense waves of heat, drought and fire that could wipe out trees that have stood for centuries. It's already revamping the ecology of the landscape.

The government says that the poverty rate for 2011 was 15 percent, essentially unchanged from the year before. That still means that more than 46 million people lived below the poverty line last year. According to one economist, "the bad news isn't as bad as it has been."

Woodland forest fires are burning with such power and size, no one can remember anything like it. The problem with fires of this intensity is that the forests can't recover — they are completely destroyed.

The West Los Angeles VA Medical Center is a nearly 400-acre campus whose onetime sole purpose was to house veterans, but some say it has lost sight of that mission. The Department of Veterans Affairs has been renting chunks of the land, mostly to enterprises that have nothing to do with helping veterans.

Huge wildfires are burning in the West — setting new records for damage this summer. These megafires are burning bigger and hotter than ever before. Scientists say climate change and a century-long policy of fire prevention — which inadvertently turned forests into giant tinderboxes — are to blame.

Last week's testimony before Gambia's Truth Commission riveted the country and described a culture of systematic sexual abuse in the presidential palace.