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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?

Gauging just what's going on with claims is proving difficult, however, because of some positive news: automakers have been skipping their standard summer shutdowns. So layoffs have likely been lower than normal.

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.

Earthcorps members from more than 60 countries work daily to restore and invigorate the Puget Sound bio-network.

The Aurora theater shooting has prompted Hollywood to reconsider the role of movie violence. Similar conversations are taking place among novelists, video game makers and other artists. Director Rob Cohen, crime writer Laura Lippman and video game designer Chris Hecker talk about violence and art.

The driver lost control the bus blew a tire and crashed into a concrete pillar.

Seth Collins says his brother Aaron's request that the family give a waiter or waitress an "awesome" tip has touched people around the world.

Photographer Roman Vishniac, perhaps most famous for documenting Jewish communities in Eastern Europe, was also a pioneer of cinemicroscopy — filming through a microscope. Flora Lichtman looks back at Vishniac's science cinema and talks to Dutch photographer Wim van Egmond about how he makes his award-winning images and videos of microorganisms.

The Centers for Disease Control and Prevention has issued new warnings about a flu virus that infected 16 people in three states in the last few weeks. Almost all the infections occurred in kids who had close contact with pigs at agricultural fairs.