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A team of scientists has discovered that dung beetles climb on dung balls and dance around in circles before taking off. This dance is not one of joy, however — the insects are checking out the sky to get their bearings. Melissa Block and Audie Cornish have more.

After nearly three years of job growth, the trend is likely to continue, economists say. Retiring baby boomers are expected to create new openings and increase demand in the health care sector as they age.

GM, Ford and Chrysler are turning their focus to selling luxury cars — something they haven't succeeded at in decades. They're hoping that success in the competitive but lucrative luxury sector will signal that the U.S. auto industry's comeback is complete.

The Venezuelan president remains in Cuba, receiving treatment for cancer. His supporters — with the backing of the Supreme Court — say that he can be sworn in at a later date.

Some who live along the Gulf Coast say the $4.5 billion in criminal and civil penalties aren't enough. Local authorities will continue to press their cases.

Mitt Romney's new running mate has authored some provocative policy proposals to cut budget deficits and overhaul Social Security, Medicare and Medicaid. But Rep. Paul Ryan has also been an advocate for a different course for the Federal Reserve.

The auto industry is big business in Ohio. Billions of dollars' worth of cars and auto parts are made in the state each year, and hundreds of thousands of unionized auto workers live in the state. So, the auto bailout is a hot issue — and a complicated one.

As many as 40 percent of urban families in sub-Saharan Africa farm in household or commercial gardens. A survey from the United Nations finds that these urban farms, which feed millions of people each year, are in jeopardy if they're not protected during Africa's growth spurt.

Just 2 percent of delegates at the Republican National Convention were black. That's higher than the percentage that supported Mitt Romney in a recent poll: 0. And getting blacks on board may prove especially hard for the GOP presidential candidate given the tone of some recent campaign ads and a wave of new voter ID laws.

A deadly assault on an Egyptian border post is proving to be the biggest challenge to face Egypt's new leader so far. Mohammed Morsi is now struggling to assure an exhausted nation that he can provide security as well as basic services. But he needs the support of the military, his biggest rival.