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A mile-deep mine in South Dakota was closed a decade ago. Now, it's been cleaned up and revamped as an underground science laboratory. Scientists hope the experiments thousands of feet underground will help prove the existence of dark matter.

We may romanticize that strawberries are grown down the road, but most of them come from California. And a complex web of plant cloning practices, relocation and fumigation has cropped up to keep it that way. Although scientists are exploring new options, like soil-free growing.

A man from Great Falls, Mont., made all the right moves. He took his girlfriend to a Cubs game in Chicago and arranged to flash a message on the stadium's giant screen: "Erica, will you marry me?" But she was in the beer line.

In the 1970s, minimalist artist Donald Judd moved to a dusty town in West Texas, where he created giant works of art that bask beneath vast desert skies. In the years since, Marfa has emerged as a mecca for art tourism.

Democratic incumbent Claire McCaskill is facing a tough re-election fight. On Tuesday, Republicans will select their candidate to challenge her in the fall. All three major contenders are dyed-in-the-wool conservatives who have been battling in a wild and expensive race.

Oyster farmers have developed coping strategies for the higher levels of carbon dioxide that make it hard to grow oysters off the West Coast. But some scientists warn that the problem is only going to get worse.

There's ample evidence cholesterol-lowering pills called statins can reduce the risk of a repeat heart attack. But there's fresh debate about the widespread use of statins to prevent heart attacks in people who've never had one. Are the benefits worth the risks?

Sequestration is on the minds of many on Capitol Hill. It's the jargony term for automatic across-the-board budget cuts scheduled to begin taking place in January if politicians cannot agree on a deal to cut the federal deficit. Half of those cuts — totaling some $500 billion — would come from defense. House Republicans are blaming the Obama administration and are demanding the Pentagon explain where it would cut. The Pentagon refuses even to plan for the cuts.

It's hard to find a discipline that Team USA has dominated more than the women's sabre. The team is anchored by two-time medalist Mariel Zagunis. But there's no way the Americans — or any team — can win a women's sabre medal in this year's Olympics. Because there isn't one.

Romney said her horse did not disappoint in its first Olympic appearance. The event concludes Friday.