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Calcium has been touted to stave off osteoporosis and promote bone health. But new research suggests going overboard on calcium consumption could lead to kidney stones or even a heart attack.

Poland is part of the EU but hasn't yet adopted the euro single currency. An economic success story during rough times, Poland's economy grew an average of nearly 4 percent annually since 2008. But now there is concern that the crisis in the eurozone may threaten the country's post-communist run of prosperity.

Egypt's first freely elected president made history Sunday when he ousted top military chiefs. Mohammed Morsi had been hesitant to confront the country's top brass, who've long been suspicious of the Islamist leader. But in one fell swoop, Morsi shifted the balance of power, ordered top generals into retirement and asserted civilian authority over the military leadership.

Researchers used economic principles to predict which countries would win the most medals at the London Olympic Games. The study was 95 percent accurate for the 2008 games. And this time around, it was 97.7 percent accurate.

NPR's Ari Shapiro is on the road with the Romney campaign. He talks with guest host Linda Wertheimer about the scene on the USS Wisconsin when Mitt Romney made his vice president selection announcement.

Wildfire-ravaged Colorado is experiencing its most destructive fire season ever. Large blazes have destroyed more than 600 homes and claimed the lives of six people. The recovery process is only just beginning for the scores of people who lost their homes.

The judge also affirmed a gag order, keeping parties involved from talking about the case.

From the London Games' opening ceremony through 302 medal events, these Summer Olympics have fed fans a rich diet of history and spectacle. I can only wish that I'd been able to eat it all — but part of the allure of the Olympics is that there's no way to watch everything.

Many residents of the Boot Hill cemetery in Tombstone, Ariz. — including gunfighters, miners, saloon keepers and train robbers — met untimely ends.

At stake is whether Louisiana will now have its first African-American chief justice. Justice Bernette Johnson was elected in 1994 to a special seat created to remedy racial disparities. Now, there's a conflict over whether she is actually the longest-serving justice, and therefore entitled to be the chief.